i cant stop watching your videos. keep it up :) i love green energy so anything you can do about it is interesting to me. something that bugs me right now is if i could use a joule thief to charge a battery using a solar panel that generates less voltage than the one on the battery. (i have some spare small panels i want to use)
Very nice experiment :) you can also use a special dc to dc converter that start at 20 mV and will boost up the voltage to up to 5 volts :) very low amp but awesome for charging super cap :) Thanks for sharing!
Very cool! I was expecting more power even though that is not what it's designed for. I'm always amazed by your high quality and well done videos! Wonderful job!
Thanks! There was some question if the metal clips were conducting heat from one site to the other, bypassing the Peltier module but I just verified that I get the same thing when using rubber bands.
Yeah I thought of that. That is what I was expecting though cause steel does not conduct that well. Plus it is a long and small path for the heat to travel. I also wondered if it would help if you added thermal past to get better heat transfer or did you?
Another nice video- thanks. Seems like a nice way to generate energy anywhere there's a hot spring near snow/ice or even a cool environment. I am curious, did you record the temps of the reservoirs? a)When you started. b)When you recorded Imax & Vmax c)When the output first failed to light the LED? What was the temp delta for each case? Finally- did you record the volume of water in each reservoir, if so, how much? Thanks for the videos- good way to get my kids interested in physics.
+sarcasmo57 Do you have a water cooler inside there beside that water heater? The ones I've opened were using it to cool water. The units had both a hot water tap and a cold water tap. Look for a big metal finned heat sink on the cooling side. If you have a cold water tap too and no Peltier module then it'd be interesting to know how the cooling is done.
Aidan Gieg Sounds like fun, and combines the two things a Peltier module does, but other than that I don't know why you'd do it. A joule thief doesn't put out more energy than you put into it. It puts out less, since there are losses. It's a misconception that it puts out more, in case that's what you were thinking.
RimstarOrg Yeah it would be a good proof of concept and I know that there are inefficiencies with joule thieves but the joule thief would be to raise the voltage to charge the battery. although the excessive current on the unit could cause voltage collapse...
Good explanation of the joule theif for idiots like me. I guessed that's kind of how it worked from a Big Clive video, but he gave a very complicated explanation.
I am glad you went ahead and made a video on the seebeck effect. You have always had a amazing way explaining things. I agree that TEC are not ideal for power over a TEG from my experience but there is very little difference between the two. So I looked into how they are designed from engineering standpoint. The insulation in between the plates is affecting the amount of current being able to be produced slowing down the movement of electrons through the element. The other difference is the size of the element between the plates. The ones I own do not have this insulation. I have a few of both kinds but I was able to get the led to produce without joule thief with my TEC's. The clips might be passing thermal energy and thermal paste makes a huge difference on that scale. As well the performance can be increase with stacking of modules. To better explain lets say one can only produce .5 millivolts and if you stack another one on top of it could increase the output for the first module maybe to .8 to .9 millivolts. The second module experiences this effect too. I had to get a thermal laser added to my data collecting and it helps tremendously with my testing. I may document my experience in building a larger scale one for RUclips as you suggested in your last reply to me but I am not very good at the video editing. Let alone at explaining things to a caliber such as yourself. :)
I checked regarding the clips conducting heat around the Peltier module. I used rubber bands instead to hold it all together. I got voltage and current in the same ballpark. So the clips weren't having a significant effect. It could be due to the respective LEDs we were using. I'm using a 1.85V, 20mA, 1,400 mcd LED. Maybe you were using one that required less in order to light it.
RimstarOrg Yea I could see led playing a part. It also could be the set up with the bars. I have noticed most TEG designs have the thermal energy directly to the plates and using things like fire as it's source. To bad though that TEC module has such a low heat rating. I would have probable done the same type of design with water as my source of thermal energy. I guess it can't be helped. The current cost of the TEG/TEC really make this tech less desirable for the output even at 5 percent efficiency. The price is hiked up for what they actually are in materials and design. It is the same some say or used to say about the solar price gouging and control of the market. That is why I am trying to make my own TEG from up-cycled parts. The tech at it's core is a fairly simple design. The bonding of the joints is really the biggest issue for me for the project. I hope to have something to show soon.
directeeccks I plan on doing a little experimenting at some time too (and will release video when I do.) I'd be interested in hearing what you come up with.
Have you considered making a thermopile to accomplish the same effect? A DIY thermopile could be made from cheap thermocouple wire spot welded together. You could make a large number of junctions in series for nice large voltages.
The Peltier modules are made from doped silicon like an integrated circuit, and use the same effect as a thermocouple. What is commonly called a theremopile is usually made from many metal/metal thermocouples which should make them a lot more efficient. It's just a lot more labor intensive to make a thermopile. They also take much more heat. You could power your LED with a match!
USWaterRockets Hmmm I'd still call them a thermopile since internally Peltier modules are multiple thermocouples, albiet made from differently doped silicon, in series. But my understanding is that homemade metal/metal ones are a lot less efficient, and it looks like you couldn't power and LED with a match. However, you've definitely gotten me wanting to experiment.
RimstarOrg A candle flame is roughly 1800 degrees F, so you should get about 60mV from a single type J thermocouple. Thermocouple wire is dirt cheap, and you can weld the wires with a welding transformer or car battery to form thermocouples. Twisting them together and clamping works okay too.
USWaterRockets Sure, but what's the current? Since for normal application of thermocouples, only the voltage matters, I couldn't find mention of current. I suspect it's pretty low.
I am fascinated by peltier modules and the creative ways people are using them. I am wondering. Could many of them be installed just inside a home's external walls to generate electricity during the winter months? Or to run a current through them in conjunction with a heatsink to create heat within the walls?
Robb Conn Peltier modules are not very efficient so it's probably better to use other methods. Electric heaters, the kind with hot glowing wires, are far more efficient.
RimstarOrg Thank you for the response. I don't mean to use them to heat the house I mean as a way of generating electricity. There is a lot of surface area around a hone and with enough of the devices I would think that they would add up. Not that it is a magic bullet but that it would be part of a larger system. Like in addition to solar panels. I'm just curious if the difference in temperature from the outside of the house during the winter and the inside being warmed by conventional methods would create conditions that could make it feasible to generate enough energy to be worth while. Thanks again for the response I appreciate your time.
Other question When I put the cool side of pltier on aluminium piece to cold the cool side And put my hand to add my TEMP to the hot side Can I get a delta TEMP to operate led Note: aluminium piece is remove the highest hot TEMP Thanks my dear
You will need a much more efficient joule thief circuit than the one showm in this video. I have tried out many different setups, however the best i came up with was to use an old germanium transistor. With that i succeded to power an LED only with the heat of my hand :-)! Try searching "ultra low voltage joule thief" and i am sure you will find something!
When I was camping the weekend gone a day I expected some sun didn't come! So I was getting low on power and my thoughts brought me back to this. By using a TEG paired with a boost converter, could enough power through continuous heat from a campfire be enough? A cold night after sitting at the fire it's left to continue to burn pointlessly, so with a cold night making generation more favourable why not sit the generator and recharge! Even 7-15W sent to the battery over time would be helpful. Tldr: would a suitable module give out enough juice for 12V battery charging?
Put some insulation between clips holding aluminium and aluminium strips. This way no conduction of heat will happen through clips that are conductive in nature. It leads to lower losses and higher voltage generated for prolonged periods.
Bill Bower I don't know anyone who sells joule thief circuits, but they're pretty easy to make. Here's my video showing how to make the one I used with the Peltier module ruclips.net/video/B61DU7yEsPMT/видео.htmlhere is the more efficient commercial version which are energy harvesting chips. Here's a random link about them www.linear.com/products/energy_harvesting
Thank you very much. Your videos are great to watch. It's refreshing to see intellectual videos instead of the Taylor Swift and Miley Cyrus garbage lol.
You have to keep a set amount of temperature difference for the seebeck effect to work... If one end is heated by the sun the other must be cooled by a water -cooling loop... it wouldn't be efficient. Who knows maybe one day the pelteir stacks will be good enough to work that way.
Hi are there any other circuits that can help instead of using the joule thief? I’m experimenting on powering items and the maij goal is to NOT use a battery any tips?
I have a question, please respond soon. I am planning to build a flashlight that can be powered by the heat of the human hand. How many Peltier tiles do you think I would need to generate enough electricity to make it work? Would I need to add a circuit or make any changes to the tiles?
For my specific TEC type Peltier module, I needed a difference of around 90-100 celsius since I had near boiling water on one side and icy cold water on the other. You'll have to check your specific module though. If you're trying to generate electricity then I'd suggest going with a TEG, as I talk about near the end of the video. Then you should be able to generate electricity with a lower temperature difference. You'll have to look up the specification for a module or experiment to find out how much.
Thx a ton! I was wondering how to get one of these to generate electricity for a science fair... Good thing I didn't get the wrong type! I'm wondering if these things are expensive... I found a few that are about 2 bucks each on ebay, and some that are 20 bucks on amazon....
would the efficiency increase if you get 6 modules, glue their sides one to each other (heated and cooled side in series) and then use the electricity?
Gotin Fuklio That's hard to say without trying it. I could argue that it'd be less efficient because you'd be inputting the same energy but have more places for losses along the length of the stack of modules.
Thanks! I've never tried it so I can't say for sure. It may even be that a TEG, unlike the TEC I used here, might do it. I've only ever had TECs to play with.
You can see the part number at 2:53. It's H12705. A quick search found www.rajguruelectronics.com/ProductView?tokDatRef=MTUyMA==&tokenId=NTE=&product=TEC1-12705
Is both the hot and cold required, or just a temperature gradient? Could you use waste heat to generate small amounts of electricity? Even if the amount was extremely marginal, could you apply it to the back of a refridgeration unit post compressor to utilize the waste heat post compressor to cool it even more before hitting the expansion chamber, making a tiny amount of electricity to help power the fridge while also improving the cooling potential? Could you use this at a larger scale and scavenge waste heat from a car exhaust for example, or a wood burning stove?
You need the hot and cold to get the gradient. But the gradient is what you're after. However, too hot and you melt the solder inside the module. More gradient equals more power.
+hsprings I guess if you had a big manufacturing plant with something in it that gets very hot, like a boiler, then you could channel some of the waste heat to somewhere where you'd have a bunch of the TEG type of peltier modules along with a cold source. Given the low efficiency of these peltier modules, there may be more efficient ways of using that waste heat. I think it's called cogeneration, in case you want to look further into what's done.
Hey sorry to bother you again, but I wanted to ask you if you that I have only 1 pettier tile and not a joule thief circuit, but I want my 20Ma LED to light up. Should I increase the temperature or do something else. Thanks for the video!
I don't know. What's the voltage rating of your LED? The one in this video needed 1.85 volts, and is rated for 20mA. I have another here that's brighter and needs 4 volts, and is also rated to 20mA, and probably wouldn't work with my TEC, even with a joule thief, but might work with a TEG. So it also depends on what type of peltier module you have. Do you have a TEG or a TEC, as I explain at 2:54 in the video? Knowing what type will tell what temperature it can handle, as I also explain at 2:54. Where did you get it? What's written on it?
I need help please respond asap thank you! I am making a flashlight which runs on the heat of your hand by using peltier tiles and I would need to light up a 2-3 volt LED light, how many and what model exact of pe4ltier tiles will I need to do so, this is for a science fair project Thanks!
Juan Carlos Guerra I didn't measure the voltage or current. But given the brightness of the LED the output voltage going to the LED was probably in the same range as in my video "ruclips.net/video/B61DU7yEsPM/видео.html", around 24 volts peak to peak. As you can see in that video the input voltage was around 1.27 volts. I don't know what the current was. It's hard to measure current given the waveform.
I'm not sure I understand your question. In the video, at around 2:30, I show that it took around 12 seconds for enough heat to make its way up the aluminum for the Peltier module to produce enough voltage to power the LED. Then I show how the temperature difference remains sufficient for around 15 minutes.
You'll still have a cold side since the other side will be cooler than the hot side. But some heat will move from the hot side through the peltier module to the cooler side and if you don't take that heat away then the cooler side will warm up and both side will be hot and it'll not work. You also need a minimum temperature difference for it to work but the value of the temperature difference depends on the peltier module. You'd need to look it up in the specification for the module.
That depends on the TEG. If you have one in mind then look up the part number online for a specification and it will likely give you a chart for how much voltage, current, and/or power per temperature difference. I don't have one off-hand.
I am wondering if its possible to use the natural heat of the earth beneath the "frost line" (a steady 50 degrees) and use the temperature at ground level to basically make a geothermal TEG. I just need to know a approximate heat difference need for electrons to move.
Look up heat powered stove fans, those should give you an idea or something cheap to play with. Most of those fans require a minimum of 125*F heat source and ambient air temp around 68*F just to start turning the fan. It's not until about 140*F that the fans start moving air that you can feel.
I recall seeing some on ebay back when I made this video, but I had to look through quite a few to find them. Mostly they were thermoelectric coolers for me too. I think I found some on regular websites too by googling "TEG" or "thermoelectric generator", but I never checked if they had a minimum order quantity.
One doubt???What would happen if we place water at room temperature in cooler side and supplying heat continuously to hot region ,will it still tends to flow of electrons or not
The cooler side will get warmer and warmer until it's the same temperature as the hot side and then no more electricity will flow. For continuous electricity, you need to keep the hot side hot and the cool side cool.
Yes. As I said, both TEC and TEG generate electricity but TEG is designed for it and so can generate more power than TEC. I'm using TEC because that's what I happened to have.
Pls respond quickly.. Im doing something like this for my science fair projects. Can you please explain how you cut the aluminum and where you got it? Can any other metals be used? Please respond as quickly as you can!
+Aakriti Lakshman The aluminum is aluminum bar which I got from Home Depot and I cut with a hack saw. You could probably just get some kitchen aluminum foil and fold it on itself 20 or 30 times until it's nice and thick and stiff and use that instead. Otherwise pretty much any metal will do, though aluminum and copper are both very good conductors of heat.
Neat idea. I'm sure you can use concentrated sunlight but whether or not a small magnify will do it or one of those small Fresnel lenses used for reading (basically a bigger lens) or something even bigger would be needed I don't know. If you try it let us know how it goes!
Thank you so much for the quick reply sir! I will surely update you as soon as possible! So should I buy a 30X magnification glass? Or higher than that?
Would it be possible to put something needing cooled on the hot side, and a heatsink with fan on the cold side, and use the electricity from the Peltier module to power a fan to cool the heatsink?
Well, you'd need to supply more energy in than you'd get out, otherwise you'd be violating conservation of energy. So if the cold source is provided by something external and the hot side is kept hot by something external then sure, you can theoretically run the fan off the modules electricity output. All your fan would be doing it moving an externally supplied energy (heat) around. Ground source heat pumps work on the same principle. The ground (ultimately the sun) supplies the heat energy and the pump just pumps it around.
I had a look and the only asymmetry in their construction I can see is that the wires connect on the metal plates inside on the hot side of the Peltier module. Unfortunately I recently broke both of mine so I can't test.
RimstarOrg Thanks,I think I found it,I will give it a try,I just didnt want to screw this one up.I got it out of a one can of soda cooler.They are hard to find in my area unless you luck up and find something with one in it,and I dont want to order online,they are too expensive.
One question please: I'm trying to replicate the famous peltier torch from Ann at the Google Science Fair but I don't see a way to get enough energy from such a small difference of temperature as room and hand temperatures... Any guess? Maybe many peltiers in series? Thanks very much!
DoNotPushHere Which type of Peltier module do you have? A TEC or a TEG? If I'm remembering correctly, I've seen videos of people get a little electricity from the difference in temperature between body contact and room temperature with TEGs. Mine is a TEC so as I point out in the video, it's not great for electricity generation.
RimstarOrg I realized I have a TEC so same problem but as you say, it's not very promising. Yours on the video is a TEG right? and still is only able to light a red LED with a joule theft... I still don´t have the numbers done but my question was (based on your experience with TEG's) in order to buy the correct type and number of TEG, besides making a suitable Joule theft. Thank you very much!
RimstarOrg... I see... well, then I'll read all the specs of the cheapest TEG to see if it could work for anything useful. Asimpler question: would a Joule theft be able to power a dc motor? I mean: it works releasing pulses of stored energy, am I right?
DoNotPushHere You'd have to put more of a circuit for a joule thief to power a DC motor. A DC motor wants steady, constant current. The output of a joule thief is any but steady and constant. So no, it shouldn't be able to run a DC motor.
Hello, I can't use the joule thief, but is there a way of making the led light up? Maybe it needs to be less voltage? How much volts was the led approximately? Thx
That LED is rated for 1.85 volts, though it will light with 1.5 volts I think. The voltage from these peltier modules is too low. You'd either needs to connect more of these peltier modules in series (something I haven't done since I have only one of them) or get a thermoelectric generator (TEG) type which has a higher output.
It generates electricity without the joule thief, but not enough to power the LED. The joule thief builds up a bunch of energy in a magnetic field while NOT powering the LED. Then it dumps it all in quick burst into the LED, turning it on briefly, but at least it's enough. Then it builds it up again while not powering the LED, and then dumps it all again. So the LED isn't actually on all the time, but it works. To get more electricity so that you don't have to use a joule thief you either need to get the thermoelelctric generator (TEG) types of module or connect more than one of these thermoelectric cooling (TEC) types in series, something I haven't played with yet since I have only one of them.
1 question. if we put ice on only one side of the peltier, will the other side become hot?? similarly if we put a dish of hot water, on one side of the peltier, will the other side get cold ?? pls answer quick i have a science exhibition???????
No. Simply heating or cooling one side won't do it. In order to heat and cool the two sides you have to run electricity through it. I show doing that in this other video ruclips.net/video/RC16MwzFq8A/видео.html. But if you have too much current running through it you could overheat it and damage it so you have to be careful. Luckily I had the circuit I took from the water cooler to look out for that (shown in that video).
An interesting video , and i will like to try this example to deepen my understanding on how to use Peltier application to test 1U cubesat with temperature variance of -40deg Celsius to +55 deg Celsius Is it possible to use peltier module to achieve this goal? Hope to hear positive feedback from you Once again thanks for this video
That depends on what your goal is. Are you trying to generate electricity or to do temperature regulation? For electricity generation, search for some Peltier module manufacturer websites and look in their specifications or datasheets for their temperature and power output charts to see if your temperature range will generate something useful. For temperature regulation, a Peltier module isn't very efficient, only around 5% so it may not move heat fast enough, but that's something you'd have to look into. They are used as mini camping fridges so who knows.
Can u list any TEC peltier module that can meet my requirement? Am thinking of using the following components, a chiller (coolant machine C) ,switching power supply 750W, temperature controller and about 14 TEC peltier module (Laird technologies CP series, Max current 14A , Delta Tmax 67, Vmax Max: 1.7V, Temp Range: -55 to 150 deg celsius Thermo electric plate is copper Not decided yet on the thermal cooling plate and heat sink yet. Can I able to test a sample (Ikg Cubesat ) with total power consumption of 4W and temperature range of -30 to +45 deg ℃ ? Your guidelines are, highly accepted
What happens if you only apply heat to one side? Like boiling hot water on one side and ambient temperature on the other. And you constantly keep hot water to that one side.
If you have enough temperature difference then it should matter. But keep in mind that too hot a temperature could melt the solder that connects the wires to the module, disconnecting the wires.
Hi I was wondering if it would be possible to develop technology where electric appliances could return power to the grid when they are cooling down after use. I'm thinking a kettle which is heated and after taking out the water for use the residual heat in the unit as it cools, generates electricity and it is fed back into the grid. Or utilsing the residual heat generated by air conditioning and refrigeration for the same purpose. Or a warm car in a garage...hot roof...oven after the food is removed
thebigpoonwallah Theoretically it's possible. Those sorts of things are sometimes done in industry where there is waste heat, though I'm not sure if they use peltier modules. The modules are only around 5% efficient so you'd have to do the math to see if it's worth it.
Do you mean where in something that you can take apart? I don't remember where I found the small toroid I use in this video. I doubt that it was in something that you find often, because I don't remember the last time I took something apart and found one. However, the bigger toroid like the one in my video about powering a CFL using a joule thief, ruclips.net/video/FkLET8MhRbU/видео.html, can be found in any microwave oven. But I don't know if a peltier module can power that -- probably not.
Hi Dear, I am Mujeeb Ur Rahman from Pakistan. My project is to operate LED inside body and LED will operate on human body temperature. Now I ask about it that TEC requires temperature gradient and in human body temperature is contestant hence temperature gradient become zero, so what should I do? Or which equipment can I use instead of it. Kindly reply me as soon as possible. Thanks and regards
If I understand your question correctly, yes, both a TEC and a TEG require a temperature gradient. So just putting one inside a human body won't work. You need a hot side and a cold side.
I didn't measure the temperatures but the hot water I used came from a kettle with boiling water so the hot was around 100C/212F. The cold is a little harder to guess but it was cold tap water, which is usually around 10C/50F (depending on your location), with ice cubes added to keep it cold longer.
Could a heat transfer system, with a whole lot of peltier's work? I have seen where people heat water for their house. Make a box, paint it black, cover with a glass window to hold in heat, and you can boil water. If you used this system to covey heat, and used underground pipes to use cool air, do you think a normal sized roof top could provide a lot of energy?
+Randy Travis Provided you get a big enough temperature difference, which you should be able to, then it should work. You'd have to look up the temperature difference required for your TEG and maximum temperature it can handle. TEGs do have pretty low efficiency but I've heard talk of doing that for making use of waste heat in power plants and industrial sites.
The temperature needed depends on how much electricity you want to generate and is limited by the maximum temperature rating of your particular Peltier module. In my case the cold water was around 50F/10C and the hot was around 212F/100C and as you saw, that produced enough voltage and current to power the joule thief circuit and light the small LED. Mine was a TEC type module (see the latter part of the video where I talk about TECs and TEGs) so with a TEG I could have used a hotter temperature.
could you use this to power another TEC to cool or heat water or another similar substance. could you keep your cold water cold and hot water hot using two more TECs or would this over load the system (joule thief)?
+Andre Dumas I don't understand. You're already starting out with cool and hot water, so why use the output of the TEC to heat and cool more water? With the inefficiencies you'd end up with water that isn't as hot or cold.
+RimstarOrg the thought would be for it to maintain the temp of the water basins. I guess the real question is what is the max load that can be used in the circuit.
+Andre Dumas It wouldn't maintain the temp of the water basins. Conservation of energy applies here. As the basins reach room temperature, the output of the electrical power module would decrease, even if it powered a TEC that would heat and cool the basins. These things have single digit efficiencies. A joule thief does help, but only adds further inefficiencies. As for the max load, that depends on the temperature difference. You'd also be using a TEG since those are the ones designed for generating electricity. There are some voltage and current numbers lower down here for different temperatures: www.ebay.com/itm/Thermoelectric-Power-Generator-High-Temperature-Generation-Peltier-TEG-Module-/141645009131?hash=item20fab350eb
I'm using 2 TEC1-12705 thermoelectric plates connected in series. Upon heating from one side and cooling from the other I cannot find enough voltage to run a 1.5 v motor, what should I do?
That one's intended for thermoelectric cooling so it won't be very good for generating electricity, like the one I use in this video. I'll assumed that you're using a hot temperature that's close to the maximum for that module. It could be that you have enough voltage with one of them but not enough current. Did you measure the voltage while the motor was connected? Try measuring it with just one module. If it's around 1.5V then try connecting them in parallel instead. Maybe you're not producing enough current. Since they are TEC and not TEGs like I talk about at the end of the video, it's possible you just can produce the needed power. Unfortunately, since they're TECs, the datasheets don't talk about power output, just power input.
+burak ayan If you mean can you make the Peltier module with any metal, you can make one that doesn't work as well as the commercially made ones, but you do have to be careful about which metals you use together. Just do a search for "thermoelectric generator" and you should see some.
RimstarOrg thank you a lot :D I actually gonna present a topic about thermo electric generetor. while I'm doing it I also want to make an experiment. that's why I'm looking for it. thank you again
interesting idea. I saw a video on new tech in the building industry and they were showing that very thing. the whole wall was generating electricity along with the solar paint and solar roof tiles.
That doesn't seem efficient at all. This works because heat is being transferred, not simply because one side is hot, and the other cold. You can't generate electricity out of nothing. This works for the same reason a DC motor generates electricity when it is rotated; there is another force acting upon it. Essentially you want to use the heat inside your house to generate electricity to light and heat your house by transferring the heat inside to the outside through thermoelectric generators. These are not 100% efficient, in fact most aren't even 60% efficient. 40% of the heat would be lost to the cold environment, and the amount you did re-capture wouldn't be enough to produce enough power to heat your house back to the same temperature it was when you started. It's a clever idea, but it wouldn't work, sorry.
@@ri5ux435 He just said "to run some lights and stuff" , nothing about heating his house. I would think that a wall of these under the right conditions would be able to generate enough electricity to power some COB LED lights. I only needed 4 modules to power up a 1"x1' COB so why not?
Are you still using this channel? I see you replied 3 months ago. I saw your video about generating electricity from the atmosphere. Do you know anything about generating electricity from the earth's magnetic field? I've heard stories that Tesla made a 'generator ' to do that. Generating power using the atmosphere seems inefficient, correct me if I'm wrong (I'm just new to this ).
I don't know any way to generate electricity from the Earth's magnetic field, it's a pretty weak field anyway. You're right that generating power using the atmospheric electricity is inefficient or rather, there isn't much per unit area so it isn't practical.
+Giridhar Rangarajan I don't know. I don't have any chart or formula. 25 degrees also doesn't sound like a very big temperature difference. Do a google search for "thermoelectric generator temperature" to see if you can find the answer that way.
i buyed tec model X 2 and 4 piezoelectric plate . Can i generate enough electricity from human heat and sound to light an L.E.D. please answer me back soon. really in a hurry for google's fair
+Harshit Dubey Using human heat isn't something I've tried. Have a look around for videos of people who demonstrate it. I know I've seen some in the past.
+Harshit Dubey I didn't notice before that you mentioned piezoelectric plates. I was responding only about the thermoelectric ones. You can see me lighting an LED using just one piezoelectric disk in this video here ruclips.net/video/laSQ6yd7jaE/видео.html. You'd have to figure out some way of having your body tap the disk in the same way. And in case you ask, I have more on my webpage here rimstar.org/science_electronics_projects/piezoelectric.htm about where I get those disks. I haven't tried using the human body to activate them myself.
+RimstarOrg I know this is late but will the heartbeat/pulse be enough for the piezoelectric disk? (maybe use a graphene super cap to store the energy?)
No, the alligator clips were just a convenient way of making the connections. When you say yours doesn't work, if you mean powering the joule thief circuit then try testing your circuit with a battery first to see if the problem is with the circuit. You may also not be getting a big enough temperature difference. My hot water was just below boiling temperature. Make sure the cold water is very cold too.
Hello RimstarOrg Is there such a Peltier module (TEG type) which works well at a low temperature difference, say for example, Th = 35°C and Tc = 30°C? Thank you so much :)
That depends on the peltier module. You'd have to look up the part number online. For example, here are a bunch with their maximum voltages tetech.com/peltier-thermoelectric-cooler-modules/high-temperature/.
With only heat, you'll get zero volts. The peltier module needs one side to be hot and the other to be cold. It needs the temperature difference across it.
It's not quite so easy. First to have find a peltier module, preferably a TEG type for the reasons given in this video. Then get the specifications for it to find out what temperatures it requires. Then look for a hot and cold combination which meets those requirements.
![The best (cheap) Peltier module [test 2]](http://i.ytimg.com/vi/WIf339WNyOo/mqdefault.jpg)
Please do more videos and share your knowledge. You are one of the best in RUclips.
Excellent, straight to the point video.
complements on the way you designed this experiment, the details and time keeping is great. thank you
i cant stop watching your videos. keep it up :)
i love green energy so anything you can do about it is interesting to me.
something that bugs me right now is if i could use a joule thief to charge a battery using a solar panel that generates less voltage than the one on the battery. (i have some spare small panels i want to use)
Very nice experiment :) you can also use a special dc to dc converter that start at 20 mV and will boost up the voltage to up to 5 volts :) very low amp but awesome for charging super cap :) Thanks for sharing!
Excellent video and explanations; thank you very much.
I subscribed! With the bell Icon on of course. Your explanation was very clear and well detailed.
Thanks. Welcome!
Very nice explanation
Very cool! I was expecting more power even though that is not what it's designed for. I'm always amazed by your high quality and well done videos! Wonderful job!
Thanks! There was some question if the metal clips were conducting heat from one site to the other, bypassing the Peltier module but I just verified that I get the same thing when using rubber bands.
Yeah I thought of that. That is what I was expecting though cause steel does not conduct that well. Plus it is a long and small path for the heat to travel. I also wondered if it would help if you added thermal past to get better heat transfer or did you?
Makerj101
There was thermal past left on both sides of the Peltier module from when it was in the water dispenser.
Oh I see! Very good! I got one a little while ago and the past was all hardened. I should really do some more tests with it.
Another nice video- thanks. Seems like a nice way to generate energy anywhere there's a hot spring near snow/ice or even a cool environment. I am curious, did you record the temps of the reservoirs?
a)When you started.
b)When you recorded Imax & Vmax
c)When the output first failed to light the LED?
What was the temp delta for each case?
Finally- did you record the volume of water in each reservoir, if so, how much?
Thanks for the videos- good way to get my kids interested in physics.
I paused this video at 21 seconds, ran into the living room and tore apart my water heater. There was no peatier device or heat sink inside.
+sarcasmo57 Do you have a water cooler inside there beside that water heater? The ones I've opened were using it to cool water. The units had both a hot water tap and a cold water tap. Look for a big metal finned heat sink on the cooling side. If you have a cold water tap too and no Peltier module then it'd be interesting to know how the cooling is done.
Nope, this one delivers hot or room temperature. Oh well. Good video by the way.
Next time tear apart your water COOLER.
A
Thanks for the video/ information.
Last week I made my Peltier module freeze water, this week I generated electricity with it to power an LED.
cool :D
awesome, while camping I could use that with a joule thief to charge a battery, then use the battery to power a peltier.
Aidan Gieg
Sounds like fun, and combines the two things a Peltier module does, but other than that I don't know why you'd do it. A joule thief doesn't put out more energy than you put into it. It puts out less, since there are losses. It's a misconception that it puts out more, in case that's what you were thinking.
RimstarOrg Yeah it would be a good proof of concept and I know that there are inefficiencies with joule thieves but the joule thief would be to raise the voltage to charge the battery. although the excessive current on the unit could cause voltage collapse...
ahh i will choice solar panel for charging a batterys than peltier + joule thief
Good explanation of the joule theif for idiots like me. I guessed that's kind of how it worked from a Big Clive video, but he gave a very complicated explanation.
Simply amazing!! Thanks bro!
Great vid. Can you also tell me about the bass music behind it. Very creative stuff!
It's called Bicycle and it's by Kevin MacLeod (who's probably used by more RUclips videos than anyone else). His website is incompetech.com/.
I am glad you went ahead and made a video on the seebeck effect. You have always had a amazing way explaining things. I agree that TEC are not ideal for power over a TEG from my experience but there is very little difference between the two. So I looked into how they are designed from engineering standpoint. The insulation in between the plates is affecting the amount of current being able to be produced slowing down the movement of electrons through the element. The other difference is the size of the element between the plates. The ones I own do not have this insulation. I have a few of both kinds but I was able to get the led to produce without joule thief with my TEC's. The clips might be passing thermal energy and thermal paste makes a huge difference on that scale. As well the performance can be increase with stacking of modules. To better explain lets say one can only produce .5 millivolts and if you stack another one on top of it could increase the output for the first module maybe to .8 to .9 millivolts. The second module experiences this effect too. I had to get a thermal laser added to my data collecting and it helps tremendously with my testing. I may document my experience in building a larger scale one for RUclips as you suggested in your last reply to me but I am not very good at the video editing. Let alone at explaining things to a caliber such as yourself. :)
Ah, maybe that's why 1marcefilms suggested plastic clothes pins. The metal ones are more thermally conductive. I'll check it out. Thanks.
I checked regarding the clips conducting heat around the Peltier module. I used rubber bands instead to hold it all together. I got voltage and current in the same ballpark. So the clips weren't having a significant effect. It could be due to the respective LEDs we were using. I'm using a 1.85V, 20mA, 1,400 mcd LED. Maybe you were using one that required less in order to light it.
RimstarOrg Yea I could see led playing a part. It also could be the set up with the bars. I have noticed most TEG designs have the thermal energy directly to the plates and using things like fire as it's source. To bad though that TEC module has such a low heat rating. I would have probable done the same type of design with water as my source of thermal energy. I guess it can't be helped. The current cost of the TEG/TEC really make this tech less desirable for the output even at 5 percent efficiency. The price is hiked up for what they actually are in materials and design. It is the same some say or used to say about the solar price gouging and control of the market. That is why I am trying to make my own TEG from up-cycled parts. The tech at it's core is a fairly simple design. The bonding of the joints is really the biggest issue for me for the project. I hope to have something to show soon.
directeeccks
I plan on doing a little experimenting at some time too (and will release video when I do.) I'd be interested in hearing what you come up with.
Have you considered making a thermopile to accomplish the same effect? A DIY thermopile could be made from cheap thermocouple wire spot welded together. You could make a large number of junctions in series for nice large voltages.
It would take quite a few to equal a commercial Peltier module, which is really a thermopile. But it does sound like a fun thing to try.
The Peltier modules are made from doped silicon like an integrated circuit, and use the same effect as a thermocouple. What is commonly called a theremopile is usually made from many metal/metal thermocouples which should make them a lot more efficient. It's just a lot more labor intensive to make a thermopile. They also take much more heat. You could power your LED with a match!
USWaterRockets
Hmmm I'd still call them a thermopile since internally Peltier modules are multiple thermocouples, albiet made from differently doped silicon, in series. But my understanding is that homemade metal/metal ones are a lot less efficient, and it looks like you couldn't power and LED with a match. However, you've definitely gotten me wanting to experiment.
RimstarOrg A candle flame is roughly 1800 degrees F, so you should get about 60mV from a single type J thermocouple. Thermocouple wire is dirt cheap, and you can weld the wires with a welding transformer or car battery to form thermocouples. Twisting them together and clamping works okay too.
USWaterRockets
Sure, but what's the current? Since for normal application of thermocouples, only the voltage matters, I couldn't find mention of current. I suspect it's pretty low.
I am fascinated by peltier modules and the creative ways people are using them. I am wondering. Could many of them be installed just inside a home's external walls to generate electricity during the winter months? Or to run a current through them in conjunction with a heatsink to create heat within the walls?
Robb Conn Peltier modules are not very efficient so it's probably better to use other methods. Electric heaters, the kind with hot glowing wires, are far more efficient.
RimstarOrg
Thank you for the response. I don't mean to use them to heat the house I mean as a way of generating electricity. There is a lot of surface area around a hone and with enough of the devices I would think that they would add up. Not that it is a magic bullet but that it would be part of a larger system. Like in addition to solar panels. I'm just curious if the difference in temperature from the outside of the house during the winter and the inside being warmed by conventional methods would create conditions that could make it feasible to generate enough energy to be worth while. Thanks again for the response I appreciate your time.
Robb Conn
Ah, as you suspect the temperature difference isn't large enough.
great work
Other question
When I put the cool side of pltier on aluminium piece to cold the cool side
And put my hand to add my TEMP to the hot side
Can I get a delta TEMP to operate led
Note: aluminium piece is remove the highest hot TEMP
Thanks my dear
Bassim Nashri No, the delta temp will be too small.
You will need a much more efficient joule thief circuit than the one showm in this video. I have tried out many different setups, however the best i came up with was to use an old germanium transistor. With that i succeded to power an LED only with the heat of my hand :-)! Try searching "ultra low voltage joule thief" and i am sure you will find something!
I love science thanks mate.
THANKS MR. CAPACITOR
When I was camping the weekend gone a day I expected some sun didn't come! So I was getting low on power and my thoughts brought me back to this. By using a TEG paired with a boost converter, could enough power through continuous heat from a campfire be enough? A cold night after sitting at the fire it's left to continue to burn pointlessly, so with a cold night making generation more favourable why not sit the generator and recharge! Even 7-15W sent to the battery over time would be helpful.
Tldr: would a suitable module give out enough juice for 12V battery charging?
Thanks 😊
Put some insulation between clips holding aluminium and aluminium strips. This way no conduction of heat will happen through clips that are conductive in nature. It leads to lower losses and higher voltage generated for prolonged periods.
Where can I purchase a joule circuit like you used in this video? Great video by the way
Bill Bower I don't know anyone who sells joule thief circuits, but they're pretty easy to make. Here's my video showing how to make the one I used with the Peltier module ruclips.net/video/B61DU7yEsPMT/видео.htmlhere is the more efficient commercial version which are energy harvesting chips. Here's a random link about them www.linear.com/products/energy_harvesting
Thank you very much. Your videos are great to watch. It's refreshing to see intellectual videos instead of the Taylor Swift and Miley Cyrus garbage lol.
Joule here, but im not a thief
ok thank you very very much, thats my point question at you, and you answered it thank very much
solar panels oughta combine this seebeck effect and increase output while also reducing damage to panels
You have to keep a set amount of temperature difference for the seebeck effect to work... If one end is heated by the sun the other must be cooled by a water -cooling loop... it wouldn't be efficient. Who knows maybe one day the pelteir stacks will be good enough to work that way.
yeah id agree with you on that... many things should and could make much use if it. the heat wasted would be of use.
Hi are there any other circuits that can help instead of using the joule thief? I’m experimenting on powering items and the maij goal is to NOT use a battery any tips?
I have a question, please respond soon. I am planning to build a flashlight that can be powered by the heat of the human hand. How many Peltier tiles do you think I would need to generate enough electricity to make it work? Would I need to add a circuit or make any changes to the tiles?
I don't know how many tiles you'd need. I suspect too many since the heat of the human hand isn't very hot.
@@RimstarOrg help me! The difference in temperature between the two plates must be of how much to be able to generate energy?
For my specific TEC type Peltier module, I needed a difference of around 90-100 celsius since I had near boiling water on one side and icy cold water on the other. You'll have to check your specific module though. If you're trying to generate electricity then I'd suggest going with a TEG, as I talk about near the end of the video. Then you should be able to generate electricity with a lower temperature difference. You'll have to look up the specification for a module or experiment to find out how much.
Do you not risk that the black clamps will 'short' your circuit, both thermally and electically?
I did verify that they don't conduct electrically but I guess there would be some thermal conduction.
@@RimstarOrg ,ok- thanks for a nice experiment!
Thx a ton! I was wondering how to get one of these to generate electricity for a science fair... Good thing I didn't get the wrong type! I'm wondering if these things are expensive... I found a few that are about 2 bucks each on ebay, and some that are 20 bucks on amazon....
+Brian Moon I've never bought any, I've only salvaged them from things, so I don't know if the low priced ones are any good.
Oh... I'll keep my eye out for other comments...
Is there an easy way to make those joule thief modules? I mean, I have to buy tons of parts for them, and they all cost decent money...
+Brian Moon Sure, they're fairly easy to make. I show how here ruclips.net/video/B61DU7yEsPM/видео.html.
Yeah... I was looking at that video... To buy all the parts, however, costs quite a bit...
would the efficiency increase if you get 6 modules, glue their sides one to each other (heated and cooled side in series) and then use the electricity?
Gotin Fuklio That's hard to say without trying it. I could argue that it'd be less efficient because you'd be inputting the same energy but have more places for losses along the length of the stack of modules.
Hi! Loved ur video and wanted to try it out. Just one question- will a peltier module with 12V 92W work for lighting an led?
Thanks!
Thanks! I've never tried it so I can't say for sure. It may even be that a TEG, unlike the TEC I used here, might do it. I've only ever had TECs to play with.
so nice
123 mW of power is quite low--given the energy transfer between freezing & boiling temps.
Which TEC1 model device did you use?
You can see the part number at 2:53. It's H12705. A quick search found www.rajguruelectronics.com/ProductView?tokDatRef=MTUyMA==&tokenId=NTE=&product=TEC1-12705
@@RimstarOrg Ty!
Is both the hot and cold required, or just a temperature gradient? Could you use waste heat to generate small amounts of electricity? Even if the amount was extremely marginal, could you apply it to the back of a refridgeration unit post compressor to utilize the waste heat post compressor to cool it even more before hitting the expansion chamber, making a tiny amount of electricity to help power the fridge while also improving the cooling potential?
Could you use this at a larger scale and scavenge waste heat from a car exhaust for example, or a wood burning stove?
You need the hot and cold to get the gradient. But the gradient is what you're after. However, too hot and you melt the solder inside the module. More gradient equals more power.
Hey, just wondering... can this be used for commercial electrical generation if your hot and cold sides are sufficiently large?
+hsprings I guess if you had a big manufacturing plant with something in it that gets very hot, like a boiler, then you could channel some of the waste heat to somewhere where you'd have a bunch of the TEG type of peltier modules along with a cold source. Given the low efficiency of these peltier modules, there may be more efficient ways of using that waste heat. I think it's called cogeneration, in case you want to look further into what's done.
Where to get this pelteir module?? Is it available to buy one? And how much it will cost??
I think most people get them from ebay. I know of one electronics store here in town that sells them.
Hey sorry to bother you again, but I wanted to ask you if you that I have only 1 pettier tile and not a joule thief circuit, but I want my 20Ma LED to light up. Should I increase the temperature or do something else. Thanks for the video!
I don't know. What's the voltage rating of your LED? The one in this video needed 1.85 volts, and is rated for 20mA. I have another here that's brighter and needs 4 volts, and is also rated to 20mA, and probably wouldn't work with my TEC, even with a joule thief, but might work with a TEG. So it also depends on what type of peltier module you have. Do you have a TEG or a TEC, as I explain at 2:54 in the video? Knowing what type will tell what temperature it can handle, as I also explain at 2:54. Where did you get it? What's written on it?
Wow very nice channel .grad im here
And for creating that generator should I go for the TEC type or the TEG type because I bought two TEG types
Fixing hot plate at 50 degrees and the heat sink, which thermoelectric module would produce more power: TEC1-12702, TEC1-12706 or TEC1-12710?
The way to find out is to search for the datasheets for each one online. There you'll find a chart of temperature and output.
I need help please respond asap thank you! I am making a flashlight which runs on the heat of your hand by using peltier tiles and I would need to light up a 2-3 volt LED light, how many and what model exact of pe4ltier tiles will I need to do so, this is for a science fair project
Thanks!
Hi, could you tell which is the current and the voltage after you place the joule thief, thanks!
Juan Carlos Guerra I didn't measure the voltage or current. But given the brightness of the LED the output voltage going to the LED was probably in the same range as in my video "ruclips.net/video/B61DU7yEsPM/видео.html", around 24 volts peak to peak. As you can see in that video the input voltage was around 1.27 volts. I don't know what the current was. It's hard to measure current given the waveform.
Is there any feasible way, to use peltiers on a hot exhaust pipe or woodstove, to generate around 11-13 volts at 3 amps output ?
how many hours did u leave the peltier module between the cold and hot water??? please answer asap our defense is next week
I'm not sure I understand your question. In the video, at around 2:30, I show that it took around 12 seconds for enough heat to make its way up the aluminum for the Peltier module to produce enough voltage to power the LED. Then I show how the temperature difference remains sufficient for around 15 minutes.
RimstarOrg oh sorry i didn't watch the whole video
RimstarOrg what if i only put the peltier module on a hot side? will it still work without the coldside?
You'll still have a cold side since the other side will be cooler than the hot side. But some heat will move from the hot side through the peltier module to the cooler side and if you don't take that heat away then the cooler side will warm up and both side will be hot and it'll not work. You also need a minimum temperature difference for it to work but the value of the temperature difference depends on the peltier module. You'd need to look it up in the specification for the module.
Hey RimStar! What is the temperature "difference" need to make electricity work on a TEG?
Thanks
That depends on the TEG. If you have one in mind then look up the part number online for a specification and it will likely give you a chart for how much voltage, current, and/or power per temperature difference. I don't have one off-hand.
I am wondering if its possible to use the natural heat of the earth beneath the "frost line" (a steady 50 degrees) and use the temperature at ground level to basically make a geothermal TEG. I just need to know a approximate heat difference need for electrons to move.
Look up heat powered stove fans, those should give you an idea or something cheap to play with. Most of those fans require a minimum of 125*F heat source and ambient air temp around 68*F just to start turning the fan. It's not until about 140*F that the fans start moving air that you can feel.
Where can I get a thermoelectric generator? I only see thermoelectric coolers....
I recall seeing some on ebay back when I made this video, but I had to look through quite a few to find them. Mostly they were thermoelectric coolers for me too. I think I found some on regular websites too by googling "TEG" or "thermoelectric generator", but I never checked if they had a minimum order quantity.
is there such thing, like a plat that one side would be cool and the other side would be hot?
One doubt???What would happen if we place water at room temperature in cooler side and supplying heat continuously to hot region ,will it still tends to flow of electrons or not
And what will happen to water at cooler region,will it cooled or not
The cooler side will get warmer and warmer until it's the same temperature as the hot side and then no more electricity will flow. For continuous electricity, you need to keep the hot side hot and the cool side cool.
but in your video why you used TEC? instead of TEG and it generates electricity to light the small bulb?!
Yes. As I said, both TEC and TEG generate electricity but TEG is designed for it and so can generate more power than TEC. I'm using TEC because that's what I happened to have.
ok thank you
Pls respond quickly..
Im doing something like this for my science fair projects. Can you please explain how you cut the aluminum and where you got it? Can any other metals be used?
Please respond as quickly as you can!
+Aakriti Lakshman The aluminum is aluminum bar which I got from Home Depot and I cut with a hack saw. You could probably just get some kitchen aluminum foil and fold it on itself 20 or 30 times until it's nice and thick and stiff and use that instead. Otherwise pretty much any metal will do, though aluminum and copper are both very good conductors of heat.
+RimstarOrg Thank you so much
hello!
i have a question.
can I use magnifying glass towards hot side in contact with aluminium strips and joule thief! to light the LED!
Neat idea. I'm sure you can use concentrated sunlight but whether or not a small magnify will do it or one of those small Fresnel lenses used for reading (basically a bigger lens) or something even bigger would be needed I don't know. If you try it let us know how it goes!
Thank you so much for the quick reply sir!
I will surely update you as soon as possible!
So should I buy a 30X magnification glass? Or higher than that?
I really don't know which size you should buy. If you want to hedge your bets then I'd say the highest magnification that you can reasonably afford.
Would it be possible to put something needing cooled on the hot side, and a heatsink with fan on the cold side, and use the electricity from the Peltier module to power a fan to cool the heatsink?
Well, you'd need to supply more energy in than you'd get out, otherwise you'd be violating conservation of energy. So if the cold source is provided by something external and the hot side is kept hot by something external then sure, you can theoretically run the fan off the modules electricity output. All your fan would be doing it moving an externally supplied energy (heat) around. Ground source heat pumps work on the same principle. The ground (ultimately the sun) supplies the heat energy and the pump just pumps it around.
hmm someones thinking about overunity.. hehehe
do u attach aluminum rods to peltier module who's sides are pealed off or to the normal peltier module
I connect to the normal peltier module.
Does it make a difference as to which side of the Peltier gets the heat?
I had a look and the only asymmetry in their construction I can see is that the wires connect on the metal plates inside on the hot side of the Peltier module. Unfortunately I recently broke both of mine so I can't test.
RimstarOrg Thanks,I think I found it,I will give it a try,I just didnt want to screw this one up.I got it out of a one can of soda cooler.They are hard to find in my area unless you luck up and find something with one in it,and I dont want to order online,they are too expensive.
One question please: I'm trying to replicate the famous peltier torch from Ann at the Google Science Fair but I don't see a way to get enough energy from such a small difference of temperature as room and hand temperatures... Any guess? Maybe many peltiers in series? Thanks very much!
DoNotPushHere Which type of Peltier module do you have? A TEC or a TEG? If I'm remembering correctly, I've seen videos of people get a little electricity from the difference in temperature between body contact and room temperature with TEGs. Mine is a TEC so as I point out in the video, it's not great for electricity generation.
RimstarOrg
I realized I have a TEC so same problem but as you say, it's not very promising. Yours on the video is a TEG right? and still is only able to light a red LED with a joule theft... I still don´t have the numbers done but my question was (based on your experience with TEG's) in order to buy the correct type and number of TEG, besides making a suitable Joule theft.
Thank you very much!
DoNotPushHere Mine is a TEC, not a TEG.
RimstarOrg... I see... well, then I'll read all the specs of the cheapest TEG to see if it could work for anything useful.
Asimpler question: would a Joule theft be able to power a dc motor? I mean: it works releasing pulses of stored energy, am I right?
DoNotPushHere You'd have to put more of a circuit for a joule thief to power a DC motor. A DC motor wants steady, constant current. The output of a joule thief is any but steady and constant. So no, it shouldn't be able to run a DC motor.
do I need a certain peltier module to generate electricity for a led light bulb?
+Cassandra Manzano It'd be best if you get a TEG instead of a TEC type, but as you see in this video, I managed to light one with a TEC type.
Hello, I can't use the joule thief, but is there a way of making the led light up?
Maybe it needs to be less voltage? How much volts was the led approximately? Thx
Dua!!!!
How are u feeling??
That LED is rated for 1.85 volts, though it will light with 1.5 volts I think. The voltage from these peltier modules is too low. You'd either needs to connect more of these peltier modules in series (something I haven't done since I have only one of them) or get a thermoelectric generator (TEG) type which has a higher output.
And is there a way of making the electricity without the joule theif????
Thanks for helping pls respond ASAP!!! Thx
It generates electricity without the joule thief, but not enough to power the LED. The joule thief builds up a bunch of energy in a magnetic field while NOT powering the LED. Then it dumps it all in quick burst into the LED, turning it on briefly, but at least it's enough. Then it builds it up again while not powering the LED, and then dumps it all again. So the LED isn't actually on all the time, but it works.
To get more electricity so that you don't have to use a joule thief you either need to get the thermoelelctric generator (TEG) types of module or connect more than one of these thermoelectric cooling (TEC) types in series, something I haven't played with yet since I have only one of them.
1 question.
if we put ice on only one side of the peltier, will the other side become hot??
similarly if we put a dish of hot water, on one side of the peltier, will the other side get cold ??
pls answer quick
i have a science exhibition???????
No. Simply heating or cooling one side won't do it. In order to heat and cool the two sides you have to run electricity through it. I show doing that in this other video ruclips.net/video/RC16MwzFq8A/видео.html. But if you have too much current running through it you could overheat it and damage it so you have to be careful. Luckily I had the circuit I took from the water cooler to look out for that (shown in that video).
+RimstarOrg r u sure
Yes.
How did u made the joule thief circuit?
I have instructions for how to make it in this video here ruclips.net/video/B61DU7yEsPM/видео.html
An interesting video , and i will like to try this example to deepen my understanding on how to use Peltier application to test 1U cubesat with temperature variance of -40deg Celsius to +55 deg Celsius
Is it possible to use peltier module to achieve this goal?
Hope to hear positive feedback from you
Once again thanks for this video
That depends on what your goal is. Are you trying to generate electricity or to do temperature regulation? For electricity generation, search for some Peltier module manufacturer websites and look in their specifications or datasheets for their temperature and power output charts to see if your temperature range will generate something useful. For temperature regulation, a Peltier module isn't very efficient, only around 5% so it may not move heat fast enough, but that's something you'd have to look into. They are used as mini camping fridges so who knows.
Thanks for the feedback
My goal is to use it for temperature regulation.
Can u list any TEC peltier module that can meet my requirement?
Am thinking of using the following components, a chiller (coolant machine C) ,switching power supply 750W, temperature controller and about 14 TEC peltier module (Laird technologies CP series, Max current 14A , Delta Tmax 67, Vmax Max: 1.7V, Temp Range: -55 to 150 deg celsius
Thermo electric plate is copper
Not decided yet on the thermal cooling plate and heat sink yet.
Can I able to test a sample (Ikg Cubesat ) with total power consumption of 4W and temperature range of -30 to +45 deg ℃ ?
Your guidelines are, highly accepted
Sounds like a very interesting project. But I've never looked into purchasing TECs so I don't have any recommendations for you.
how much power the peltier module consume in 1hour. and can we use it for heating purpose
what you used? TEG or TEC on that video
TEC
I think those black clips bypass alot of heat
where can I get the joule thief circuit??
Here's my video about making a joule thief ruclips.net/video/B61DU7yEsPM/видео.html. It includes the parts, circuit and goes through it step-by-step.
What happens if you only apply heat to one side? Like boiling hot water on one side and ambient temperature on the other. And you constantly keep hot water to that one side.
If you have enough temperature difference then it should matter. But keep in mind that too hot a temperature could melt the solder that connects the wires to the module, disconnecting the wires.
can we use a bunch of these TEGs in series to charge a larger battery with 200F of heat on one side and about 70F on the other?
Yes, but I don't know how many you'd need.
Hi I was wondering if it would be possible to develop technology where electric appliances could return power to the grid when they are cooling down after use.
I'm thinking a kettle which is heated and after taking out the water for use the residual heat in the unit as it cools, generates electricity and it is fed back into the grid. Or utilsing the residual heat generated by air conditioning and refrigeration for the same purpose. Or a warm car in a garage...hot roof...oven after the food is removed
thebigpoonwallah Theoretically it's possible. Those sorts of things are sometimes done in industry where there is waste heat, though I'm not sure if they use peltier modules. The modules are only around 5% efficient so you'd have to do the math to see if it's worth it.
can all kind of Peltier Module can be use to this experiment?
I can't say, I'm familiar with only the kinds of Peltier Modules I talk about in this video, the kinds you find a lot for sale on ebay.
where can you definitely find a toroid for the joules thief ?
Do you mean where in something that you can take apart? I don't remember where I found the small toroid I use in this video. I doubt that it was in something that you find often, because I don't remember the last time I took something apart and found one.
However, the bigger toroid like the one in my video about powering a CFL using a joule thief, ruclips.net/video/FkLET8MhRbU/видео.html, can be found in any microwave oven. But I don't know if a peltier module can power that -- probably not.
how did you make the joule thief?
can you send me some helpful link that i can refer to. thanks
Timeless
Good .
i have idea , how to paper a circuit by using neutral signal ? can u please share with me
what you really used? TEC or TEG Im confusing.
i want to know how can i made this peltier module ?!
Hi Dear,
I am Mujeeb Ur Rahman from Pakistan. My project is to operate LED inside body and LED will operate on human body temperature. Now I ask about it that TEC requires temperature gradient and in human body temperature is contestant hence temperature gradient become zero, so what should I do? Or which equipment can I use instead of it. Kindly reply me as soon as possible.
Thanks and regards
If I understand your question correctly, yes, both a TEC and a TEG require a temperature gradient. So just putting one inside a human body won't work. You need a hot side and a cold side.
What is the temperature needed, both cold and hot, to make it work?
I didn't measure the temperatures but the hot water I used came from a kettle with boiling water so the hot was around 100C/212F. The cold is a little harder to guess but it was cold tap water, which is usually around 10C/50F (depending on your location), with ice cubes added to keep it cold longer.
Thanj for your response. I'm getting a thermometer because for some reason mine is not working :(
Could you cover a car engine/exhaust pipe with these?
Why I reckon you could.
Sorry, couldn’t resist. 😁
Could a heat transfer system, with a whole lot of peltier's work? I have seen where people heat water for their house. Make a box, paint it black, cover with a glass window to hold in heat, and you can boil water. If you used this system to covey heat, and used underground pipes to use cool air, do you think a normal sized roof top could provide a lot of energy?
+Randy Travis Provided you get a big enough temperature difference, which you should be able to, then it should work. You'd have to look up the temperature difference required for your TEG and maximum temperature it can handle. TEGs do have pretty low efficiency but I've heard talk of doing that for making use of waste heat in power plants and industrial sites.
What is the temperature needed for the cold and hot water?
The temperature needed depends on how much electricity you want to generate and is limited by the maximum temperature rating of your particular Peltier module. In my case the cold water was around 50F/10C and the hot was around 212F/100C and as you saw, that produced enough voltage and current to power the joule thief circuit and light the small LED. Mine was a TEC type module (see the latter part of the video where I talk about TECs and TEGs) so with a TEG I could have used a hotter temperature.
RimstarOrg is it necessary to have a Joule Thief in lighting up an LED?
could you use this to power another TEC to cool or heat water or another similar substance. could you keep your cold water cold and hot water hot using two more TECs or would this over load the system (joule thief)?
+Andre Dumas I don't understand. You're already starting out with cool and hot water, so why use the output of the TEC to heat and cool more water? With the inefficiencies you'd end up with water that isn't as hot or cold.
+RimstarOrg the thought would be for it to maintain the temp of the water basins. I guess the real question is what is the max load that can be used in the circuit.
+Andre Dumas It wouldn't maintain the temp of the water basins. Conservation of energy applies here. As the basins reach room temperature, the output of the electrical power module would decrease, even if it powered a TEC that would heat and cool the basins. These things have single digit efficiencies. A joule thief does help, but only adds further inefficiencies.
As for the max load, that depends on the temperature difference. You'd also be using a TEG since those are the ones designed for generating electricity. There are some voltage and current numbers lower down here for different temperatures: www.ebay.com/itm/Thermoelectric-Power-Generator-High-Temperature-Generation-Peltier-TEG-Module-/141645009131?hash=item20fab350eb
I'm using 2 TEC1-12705 thermoelectric plates connected in series. Upon heating from one side and cooling from the other I cannot find enough voltage to run a 1.5 v motor, what should I do?
That one's intended for thermoelectric cooling so it won't be very good for generating electricity, like the one I use in this video. I'll assumed that you're using a hot temperature that's close to the maximum for that module.
It could be that you have enough voltage with one of them but not enough current. Did you measure the voltage while the motor was connected? Try measuring it with just one module. If it's around 1.5V then try connecting them in parallel instead. Maybe you're not producing enough current.
Since they are TEC and not TEGs like I talk about at the end of the video, it's possible you just can produce the needed power. Unfortunately, since they're TECs, the datasheets don't talk about power output, just power input.
The voltage with both of them connected in series comes to about 1.2 to 1.3 volts
Thanks for your suggestion.
How do I know which side to use and how to connect the cables?
I just know because I kept track of how they were connected to the water cooler which I took it from.
You can connect a battery to the wires red for post. black for neg.
One side will get warm other side cold
can ı make this with any metal ? or should I buy this ?
+burak ayan If you mean can you make the Peltier module with any metal, you can make one that doesn't work as well as the commercially made ones, but you do have to be careful about which metals you use together. Just do a search for "thermoelectric generator" and you should see some.
RimstarOrg thank you a lot :D I actually gonna present a topic about thermo electric generetor. while I'm doing it I also want to make an experiment. that's why I'm looking for it.
thank you again
If you lived in a very cold place, you cold have a wall of these outside, and use the heat inside to generate enough electricity for lights and stuff.
I was thinking the same. Anyone tried it?
interesting idea. I saw a video on new tech in the building industry and they were showing that very thing. the whole wall was generating electricity along with the solar paint and solar roof tiles.
I live in a region where it gets pretty cold in the wintertime. Been thinking the same thing for a while now. ;)
That doesn't seem efficient at all. This works because heat is being transferred, not simply because one side is hot, and the other cold. You can't generate electricity out of nothing. This works for the same reason a DC motor generates electricity when it is rotated; there is another force acting upon it. Essentially you want to use the heat inside your house to generate electricity to light and heat your house by transferring the heat inside to the outside through thermoelectric generators. These are not 100% efficient, in fact most aren't even 60% efficient. 40% of the heat would be lost to the cold environment, and the amount you did re-capture wouldn't be enough to produce enough power to heat your house back to the same temperature it was when you started. It's a clever idea, but it wouldn't work, sorry.
@@ri5ux435 He just said "to run some lights and stuff" , nothing about heating his house. I would think that a wall of these under the right conditions would be able to generate enough electricity to power some COB LED lights. I only needed 4 modules to power up a 1"x1' COB so why not?
Are you still using this channel? I see you replied 3 months ago.
I saw your video about generating electricity from the atmosphere.
Do you know anything about generating electricity from the earth's magnetic field? I've heard stories that Tesla made a 'generator ' to do that.
Generating power using the atmosphere seems inefficient, correct me if I'm wrong (I'm just new to this ).
I don't know any way to generate electricity from the Earth's magnetic field, it's a pretty weak field anyway. You're right that generating power using the atmospheric electricity is inefficient or rather, there isn't much per unit area so it isn't practical.
how much volts will it produce when there is a temperature difference of about 25 degree celcius. Please we need it for a science project
+Giridhar Rangarajan I don't know. I don't have any chart or formula. 25 degrees also doesn't sound like a very big temperature difference. Do a google search for "thermoelectric generator temperature" to see if you can find the answer that way.
i buyed tec model X 2 and 4 piezoelectric plate . Can i generate enough electricity from human heat and sound to light an L.E.D. please answer me back soon. really in a hurry for google's fair
+Harshit Dubey Using human heat isn't something I've tried. Have a look around for videos of people who demonstrate it. I know I've seen some in the past.
+RimstarOrg 4 piezoelectric plates with joule theif circuit could generate elec. to light a L.E.D. ?
+Harshit Dubey I didn't notice before that you mentioned piezoelectric plates. I was responding only about the thermoelectric ones. You can see me lighting an LED using just one piezoelectric disk in this video here ruclips.net/video/laSQ6yd7jaE/видео.html. You'd have to figure out some way of having your body tap the disk in the same way. And in case you ask, I have more on my webpage here rimstar.org/science_electronics_projects/piezoelectric.htm about where I get those disks. I haven't tried using the human body to activate them myself.
+RimstarOrg I know this is late but will the heartbeat/pulse be enough for the piezoelectric disk? (maybe use a graphene super cap to store the energy?)
I'm pretty sure that would be far too weak to do anything.
Are the aligator clips neccessary? I tried this without them and it wont work...
No, the alligator clips were just a convenient way of making the connections. When you say yours doesn't work, if you mean powering the joule thief circuit then try testing your circuit with a battery first to see if the problem is with the circuit. You may also not be getting a big enough temperature difference. My hot water was just below boiling temperature. Make sure the cold water is very cold too.
Ya turns out my issue was temperature. Got it up and running! Thanks so much for the tutorial.
Do these peltier tiles produce AC power or DC power. If it produces AC is their a way to way to convert it to DC power?
Sergio Perez The produce DC power, so no need to convert.
Thanks for answering
So can I produce electricity with a tec?
I wonder how much energy could it produce using the human body (chest and back) and ambient room temperature as the cold side.
Hello RimstarOrg Is there such a Peltier module (TEG type) which works well at a low temperature difference, say for example, Th = 35°C and Tc = 30°C? Thank you so much :)
I'm not aware of any.
all they work even at 1 degree celsius, but because of the low efficiency they cant power shi...i mean anything
will this work with body heat?
what is the maximum voltage that we can get through the peltier module ?
That depends on the peltier module. You'd have to look up the part number online. For example, here are a bunch with their maximum voltages tetech.com/peltier-thermoelectric-cooler-modules/high-temperature/.
can I use wasted heat energy instead of hot water and cold water. I mean if i only use the heat only how many volts does i give me
With only heat, you'll get zero volts. The peltier module needs one side to be hot and the other to be cold. It needs the temperature difference across it.
@@RimstarOrg okey, but if i had to use the heat of lamp what do you suggest me to use
It's not quite so easy. First to have find a peltier module, preferably a TEG type for the reasons given in this video. Then get the specifications for it to find out what temperatures it requires. Then look for a hot and cold combination which meets those requirements.
Or you can just get a random TEG peltier module and do some experimenting.
how did you make the joule thief??
This is how I made it ruclips.net/video/B61DU7yEsPM/видео.html.