Temperature-controlled Peltier Mini Fridge (Thermoelectric)
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- Опубликовано: 5 сен 2024
- This is my homemade Peltier Thermoelectric mini fridge. A Peltier thermoelectric cooler was used for the cooling, a polystyrene box for insulation, and old PC fans/heatsink for the heat exchangers.
An eBay thermostat was used for setting and controlling the temperature which is very handy, it can easily cool down the inside to 2°C.
Blog post with further explanation: joeraut.com/po...
Featured on Hackaday.com! - hackaday.com/20...
Resources list:
• Peltier cooler: www.ebay.com/sc...
• Thermostat: www.ebay.com/sc...
• Heatsinks - salvaged from old computers and electronics
• Power supply - In any desktop computer or at computer stores. Instructions to modify: www.wikihow.com...
Thank you so much for the explanation instead of having an annoying music in the background, your vid was indeed very useful!
Joseph I must apologize for my comment I have been watching RUclips videos on portable AC units. and obviously after watching a few dozen I watched your video without realizing you weren't building a portable AC, but a fridge. you actually have some pretty good ideas. I've been doing a lot of research on building a portable (12vdc) AC unit.
Peltier systems will use a lot of energy to do the job. It will drain a battery fast.
12 years ago I thought of doing a full sized single door fridge with an Peltier system.
After calulations etc etc, I found out that it would had cost me 5 times more just on parts than buying a new fridge. And the power consumption would had been 3 times more than a regular fridge back then, which would be about 5 times more power consumption compare to new fridge these days.
Which also means if you hd that fridge today you would not be able to buy a new cat becazuse you have no money
We need cats.
Sir . It's 12 yrs. ago. Since from decades LED used for indicators. Now LED has replaced the bulbs . Vapour tubes.etc. and time is coming thermocouple indicators will be used for mass heat movers..
I was wondering why fridges use vapour evaporation cooling instead of solid-state peltiers. On paper the peltier method sounds way better, no moving parts so it should be a much simpler and more reliable system. Higher materials cost could perhaps be offset by increased reliability and longer service life, but much worse cooling efficiency per watt of electricity consumed is the most serious flaw that limits usefulness in most cases. Very interesting.
Very late to comment..But maybe that's why Petlier effect and Vortex Tube don't have any commercial application.. COP too low and probably costs more too
Thanks for sharing dude. Just by amplifying the scale, adding a 120% more Peltier plates for each duplication of the cooler volume it should maintain a good operation temperature. Rigging all of this to a solar panel and battery, should be quite helpful to keep it working the entire day in the area where I live with 11 hours or more of sun daily the entire year.
Thanks for sharing it buddy! This can be really a huge breakthrough in the next future.
Thanks for the video. I am attempting to convert a wine cooler into a temperature controlled cigar humidor. This video gave me a place to start.. Todd
It all comes down to ambient temperature, something that was not mentioned once here, unless I missed it.
Your peltier module actually draws 6A and not 3,5A. I know that cuz it’s written on it :
TE = thermoelectric
C = size (C is the standard size)
127 = number of thermocouples inside
06 = current draw
From experience and on the datasheet, 12706 Modules will draw 4A at 12v. Upping the voltage to 15v will allow you to reach the rated Imax of 6A though thermoelectric units will be more efficient at lower amperes.
lol "I know that coz it's written on it"
Try reading what's written on the data sheet Einstein :)
A Peltier moves heat from one side to the other. Simple explanation
This is THE best explanation on Peltier mini fridges.
I made a Peltier fridge but I use PWM control so I can keep the temp within 0.1 degree of set temp.
curious to see what temperature you can acheive with water cans or some load inside and also in how much time you acheive it and also what current your entire system is drawing. Maybe you make another video on that and share
I have two questions please answer asap
1)How you are controlling two cpu fans and a peltier cell with one temperature controller? because the board I ordered online is same as yours and has 4 points(i.e. 12V, Ground,K0 and k1).
2)That 12V battery is supplying power to what?from where you are supplying power to your smps??
can you plz elaborate the connection of thermostat
i was going to do something like that but for a different application mainly climate control in an airtight camping box.
Nice video, awesome choice as a brewing chamber!
How can we adjust temperature inside the cooler. Can we adjust cooling of peltier by controlling the current supply or voltage variation
On the hot side, wouldn't pulling the hot air away from the heat sink instead of pushing it be more effective?
Don't hook the module up to a battery for more than a short test. There is no current limitation and a SLA battery will source you lots of current and will cook the TEC module.
you can make on for around £20, I would use a peltier plate around 100w, to bye one in shop, you are talking about £80 plus
i did an experiment with the same peltier but submerged the heatsink in ice cold water just to see how cold it got to say it got cold is an understatement it went to -50 degrees farenheit insanely cold!
+Joseph Rautenbach yes it did I actually have a video of it on my 5th newest video it surprised me that the temperature dropped so fast
+Joseph Rautenbach yeah if you get a decent heatsink and place it in ice cold water with salt it will really surprise you how cold you can get it someday i may try it with dry ice than it will get even colder
They can keep a temperature difference of around 65-67 degrees Celsius max. So if you keep the hot side cold, the cold side can be 65 under that temp. This shows the importance of the cooler at the hot side.
Awesome boss. A lot of thanks for giving me the best idea...
Thanks for the video. But i have some questions regarding Peltier cooling.
1. What was the volume that you cooled and reached -2.1 C and how much time did it require to reach -2.1 C?
2. Is it possible to make it run without the cold side sink and fan?
3. Can it be made portable by using portable battery?
hay Joseph,
one of the best video explanation on the mini fridge cooling system i ever saw, i understood from this video more than any other video seen earlier , thumbs up my man,
what im really thinking about is that i will make a bigger one (dauble size) and thinking to have a 10amp or 15amp paltier, will hook it to a water cooled device yet (i need a very silent and cooler way to cool it.the ambient heat in my area hits 40c in house, desert alike) i donno how to assemble it together specialty for the electricity as i see it difficult to understand in my eyes.
i even thought about the laptops adapter if it will work instead of the power supply im woundring,
also kindly explain how to control the temperature with the controller you showed us, will it slow down the fan or what,
guidance from your good person will be highly appreciated, and sorry for my long and bad grammar :)
Joseph Rautenbach
THEOOJOKER would like to. Connect you , I'm working on same kind of project
so i just need to directly connect the power supply to the plate and assist the hot side with heat sink with fans?
Please tell me why is the thermostat making a clicking noise and the unit has double coolers and the bottom one comes on and snuts off with a clicking noise from the thermostat and the top one never comes on ?
how much time did it took to cool-down the chamber from normal temp?
Can u please do the circuit for using more than 3-4 peltire module n according to use of more peltier it's power supply n heat sink etc
Cool, very cool idea. Now how about setting up a system for -18 degrees Celsius?
Did adding a fan on cool side effective distribute a cold on the box?
fan is pumping air into the sink or out of sink
why do u need a fan onn the inside?
Perhaps to distribute the cold?
This is great Joe!
Hey, I've built a peltier fridge like yours, I used the exact same thermostat, also an ATX power supply with a 6Amp rail, also used old CPU fans and cooling blocks. The only difference is the peltier, I've used a 12709 (which should move more heat than yours). However, i can only get around 6°C below ambient temperature (measured directly on the cold heatsink). When i hook up a multimeter i can see that the resistance in the peltier seems to increase a lot after about 15 minutes, it just draws 0 amps at one point and then climbs back to 1.7Amps and stays there, but doesn't cool down any further.
Do you have any idea what the cause for this might be?
And how did you separate the heat sinks that far? In my case i just sandwiched the peltier between the two heatsinks, attached with thermal adhesive (which i unfortunately can't remove now that they're attached, so It's really hard to tell what's wrong.
Also: I've got a second peltier of the same kind and just put it on a heatsink with the probe on the cold side and it got to 22°C below ambient temperature, so it doesn't seem to be a problem with the cooling element
To regulate the right peltier you should have used q = mcp(DT) and turned the equation into Q= pCpV(DT) which gives you the amount of energy required to change temperature from DT = (Tf-Ti). Say you have 0.4X0.4X0.4m = you can find volume by m3 IE (0.4x0.4x0.4) 0.064m3. My peltiers COP is efficient enough to change temperature from 10-30C ~~ DT = 20 C. Now design the electrical board via arduino, set bounds on temperature stat and switch DC supply of 5V via transistor to the peltier of 12V this will allow you to control temperature. It is not PID control where you send feedback to the PID and integrate the setpoint to 0 and maintain the band, essentially you are switching the transistor on and off via feedback from the temp sensor "in control logic we control this bang bang control" you are not regulating temp you are switching DC transistor on and off
Hi Joseph, thanks so much for sharing your fridge! I am not very mechanical, but I think I almost have it after watching your video three times. Just a few questions please. What is the blue thing you use to create space for the styrofoam wall to extend the heat side of the heatsink? Are the fans just computer fans or are they peltier thermoelectric fans? Please get back to me. Thank you, Adam Walke
Hi there, what would I need to do to bring the temp down to -30 degrees Celsius? Im making a cooling chamber for my Senior design project and would greatly appreciate your feed back.
Thank you for the video as well!
How did the project go? Did you manage it?
can you tell me....if i want to cool an area 6x6x6 or about 216 cu ft...would the battery and peltier system work???? TY for a very efficient video....
It looks pretty cool!
Quick question for a kombucha homebrewer who needs to maintain temp constant : apart from size, does it make a difference if I use a 220v vs a 12v digital thermostat? The idea is to plug 2 peltiers (and a small 12v water pump) to the thermostat. Peltiers to cool down the brewing be, pump to circulate the brew.
I don't know much about electricity but am there be a problem with the amperes?
Thanks
nice build....
The battery you used to test the peltier momentarily looked like your std 7A/h 12V SLA.
Given that the peltier alone draws 75W/12V gives you roughly 6.2~6.5 amp draw.
Depending on the condition of the battery, ambient temperatures, efficiency of heat-sinks, fans and other factors make it really difficult to calculate running time if using a battery
None the less, my shoddy math brought me to an estimate of roughly 35-45 minutes of run time before the 7A/h battery reached its max discharge allowance.
I wonder if building a sort of joule thief may improve the efficiency?
+Joseph Rautenbac
thanks for response. I was a little confused when you said a 7 Ah batterry can only draw 1Ah, but then realised you were talking about initial current.
I am still convinced however that ther must be a circuit to improve efficiency. i know that if you convert ac to dc a rectifier would create half waves. As far as i know a battery gives a steady voltage. A device that pulses the 12v at around 60 Hz should in theory double the life. It may also reduce the cooling capabilities. Worth a try though. Will test the theory once I have some spare time.
How about you cycle both fans and the peltier modules or module
why my peltier only drawn 2.25A from power supply 12V 4.2A? the peltier should be able to drawn 4.2A RIGHT?
Are you also hooking up a fan to the peltier? The fan may take up extra
Can give a explanation of its circuit design ....so that it would be easy for me to made project possible.....pls do it ..if u can
The diagram is easy. Im designing one from scratch without the Temp control. Just use thermostat to give feedback loop and use logic to set onand off voltage supply via transistoer to regulate the power to peltier
So the controller is varying about amperage delivered to the peltier plate? Is that true?
How much time does it take to reach 15-20 degrees Celsius from 28 degrees Celsius?
Hello, first thank you for this great video, but excecuse me for this question, could you please tell me the air flow direction for the second fan (the inside fan), I mean I takes the cold air from heatsink and push it into the box or vice versa (pull the hot air from the box and push it into the heatsink to become cold)?
I have an assembly similar to yours but I have a smaller heatsink on the cold side. its 40mm x 40mm and has a fan but I dont think its moving enough CFM to actually cool. The fan on the hot side is powerful. Would a larger cold side heatsink be needed or could I spread the cold with a more powerful 40mm x 40mm fan?
I'm using this 12V 5amp unit www.adafruit.com/products/1335 I took the cold plate off and replaced it with an actual heatsink with a fan. The ambient temp was 22C and I got it down to 10.1C in 45 minutes testing in the styrofoam cooler. Multimeter read 11.5V and 5.8 amps during testing. I probably need a TEC that can handle a higher temperature differential for refrigeration purposes. I'm trying to make this super insulated box with an aluminum liner in hopes the cool air will be absorbed by the aluminum liner.
28°F at what ambient temperature, delta? Will this work in a hot car where ambient could be 150°F ? Thanks
THanks a lot for sharing the video! I want to ask, how many Pelteir junction do you use?
is there a calculation on how much volume a TEC can cool? In looking at the very least 0.18m^3 of space. I have looked at data sheets but the specs on volume heat dissipation is not clear to me
hi I want to wire a thermoelectric Peltier cooler so I want to know that how much output of the thermostat it gives output and amps does it gives plz plz plz tell me
You would be better off, have a more practical and reliable fridge if you did away with the inner chamber heatsink and fan.
What I mean is make it passive. Find a metal brake (bending tool) then get a piece of sheet aluminum the thickest that your metal brake can handle. Bend the sheet aluminum into a "U" shape such that it goes around one perpendicular side of the enclosure, along the side the peltier is mounted to, and across the opposite perpendicular side of the enclosure.
This will give you a larger surface area, but especially a more effective one by having the surface extend so far. Don't use a fan so there is no issue of moving fan blades, nor condensation related electrical problems or bearing degradation. Additionally, these aluminum areas covering the inside of the box makes it much more durable - measure and fit additional metal sheets to the side opposite the peltier and in the bottom of the box even without them thermally connected.
Similarly you could make the outside heatsink out of a large piece of sheeting bent to size, but it would be best to include a thicker piece of aluminum plate as a heat spreader, AND since the inside is passive and the fan is not as much of a problem, it might be overkill to passively cool the exterior BUT it would be a safer way to design it for use around children or pets, then you could use a second temperature controller with a sensor placed in a cavity in the metal heat spreader to turn off the peltier if it exceeds a threshold temperature, to keep it from overheating.
Additionally it would be better to use multiple peltiers in parallel running at less than maximum rated power to spread out the heat, lower the thermal density. If done well using high quality peltiers a passive design built like this could last decades making it cost effective, albeit still costly to run compared to a traditional compressor based cooler. Also note that there are refrigerators for campers and the like that are compressor based, so use of a peltier is really only of benefit if on an extreme budget were power is not a problem, or if it being as small as possible is important without regard to cooling performance.
+Joseph Rautenbach I like your project. I'm thinking of making one just for the fun of it. But my idea was to take between 4 and 9 Peltier modules (and run them with lower voltage) and attach them to the top, with a very big and large heatsink.
As the hot side would be on the top, the hot air would rise and heat the room in cold conditions, while the cold air from the plates would go down (you know that hot air rises and cold air goes to the bottom). If you really require fans, you could put fans to pull air upward from the big heatsink. Like this, you wouldn't need to circulate air inside the casing, since the law of nature will take care of it, but condensation might be a problem, especially with more Peltier modules. I would put a big bowl or something on the bottom of the fridge and I'd put on it a fridge shelf or any kind of grid.
Also, I was thinking how to capture the heat from a furnace with some Peltier modules and use the Seebeck effect to make small amounts of electricity.
The problem with the idea of hot side up and heat rising is that with no open area under the heatsink, air still has to come in from the side.
For this reason it is usually more effective to have the heatsink on a side with the row of fins running in an up-down orientation. Inside it doesn't really matter because it's a closed system, except that any chilled food inside is likely to have a higher conduction rate than empty (air) so you should have better results with it on a panel that has maximum contact with the contents.
Normally that would be the bottom panel but that creates its own issues with bottom mounting the exterior heatsink for ventilation purposes.
With a larger # of modules as you described you would be best off to mount one on each side with thicker plating inside the box so that each has the maximum distance and lowest thermal density possible, plus plates inside covering the whole interior would decrease wear on the foam.
I once had a thought about putting one in a vehicle front console and just running a water block and tubing to put it into the vehicle's radiator cooling system. The vehicle engine pump already in place would provide the coolant movement, so it would likely just need strategically placed T's in the line to the heater core.
Stinky Cheese Fans would probably still do the trick, but I won't argue with you, you seem smarter than me.
I like the idea of using Peltier modules on a car console. I wish us both, best of luck with our future projects.
MrBiky I suspect that some day science will come up with a more efficient way of pumping heat, then we won't have to worry about cooling something to provide cooling!
Stinky Cheese There are 3 interesting ways to cool CPU. Peltier modules are about the same size, so, maybe you want to read this article www.makeuseof.com/tag/three-marvelous-pc-cooling-technologies-that-youve-never-heard-of/
will it cool enough to make water freeze or its just a chills water but not into ice.
Can u heat too, or do u need two, I have cheap one and it cold and warms
is this possible to be use for an cabinet full with server system and modems so they will cool down ... pls reply thank you
Nice video sir . can i know how to connect 8 or 9 pulties & how much power does it need for optimal cooling .
thank you.
Great Video Joseph! May I know what's the purpose of the polystyrene insulation at 3:24 ? I understand that the aluminium block is to extend and create space to place the heat sink, and wouldn't installing the insulation layer prevent most of the heat generated from the peltier tile on the hot side from dissipating into the heat sink? Thanks!
Hi men nice video , I only have a question. Can i connect the peltier to a car battery of 12v and 500 A
Great video
Could you please upload a circuit diagram to your blog (or somewhere else). Also, would I be able to use two modules by putting it through a 2 channel relay.
Good going dude nie work !!
wat was the room temperature?
It is seen that peltier can mantain deifference between hot and cold side of between 10 to 15 degrees .
Is there any way we can use double peltier i mean a peltier cooler inside peltier cooler. Beacuse where i stay the average temperature is 30 degree c i need temp of about 8 degree c How can i do it
Thnks
How cold did you get it down to? I wonder if I make the box smaller and have 2 peltier, could I get the temperature down to -20 Celsius?
hi, how do you wire up the automatic temperature board? I do not understand the diference between K0 and K1?
what if u enclose the heat sink of the hot side on another insulation box and, just like what the fan of the cold side does, the fan of the hot side dissipates the hot air inside the polystyrene box and serves as a heater? will it affect the cold side? please reply asap
Amazing idea
Hi. Really useful well explained video thanks! If it were electronics I side the box you wanted to cool down how would one go about managing the condensation? Thoughts? Cheers in advance!
how much space is cooled by a 1 module.... is 1 lit bottle is cooled ( 2degree Celsius)by 1 module?
thanks for sharing this great video. can I just ask on the wiring configuration,
it looks like k1 is connected to Gnd via the screw terminal,is that correct?
also is the red wire from the peltier connected to the second port of the screw terminal which bridges over to the third port to get +12V?
what wire size are you using between the controller and the screw terminal?
thanks again
How connect the peltier device with sink in the hot side and cold side? Do you use any thermal paste?
Thanks for the Video! :), but I have a doubt regarding the connection of the thermal sensor of the thermostat! Where and How did you connect the sensor, and also if you can explain how the connection of the thermostat is used to change the temperature of the Peltier Cooler inside the mini fridge. I am actually planning to use the same mechanism to cool the water bottle which will be slide into the bottle pouch in a backpack, and the bottle will be cooled as per the temperature required! Hoping you will be helping me with this project.....
its perfect for camping because one side could keep your food cool and the other to keep your shelter warm a little anyways lol. Hmm now to keep it powered.
From the Room Temperature all the way to 2 degree C --> in How many minutes?
Thank You
Yeah same question
Depending on cooling, power supply and ambient temperature. Say 20c ambient temp. and his setup, roughly 45 min to 1.5 hours.
Hello mate, im going to make such a peltier cooler for wine. Inside schould be around 18'C and humidity around 70% due to that i have some questions for you.
1. You put an aluminium block between peltier and radiator, was it warm or cold side?
2. How much wather is liquefacting, i'm wondering about 70% humidity and maybe i will have to make some kind of little tubule inside isolation to transport that wather outside, i was thinking about some kind of electric humidity cather iside, conected to humidity sensor and it will workn on/off.
***** thx :)
Hello very interesting project home refrigerator, well let me know the details of how assemble as my English is not very good get lost in part of the explanation in the video, also until cold temperature side can achieve. Thank you very much Atte: Martin Ribeiro
Hi Joseph, I would like to know more about this peltier fridge. It is have any equation involve that you use to design this fridge?
+Joseph Rautenbach Oh, thanks but why the size of heat sink at cold side is small than at hot side?
Would using a thicker insulation help? xps foam board is cheap. Mabe use 4" insulation for the walls? Like a good ice chest design.
I tried the same idea.. But I didn't get refrigeration.. The temperature keeps increasing.. May I know y..?
Please can you tell me how to maintain the temperature in cold side
can we connect " ground " of thermostat to k1 using a dupont (jumper) and have all ground from all devices connected to k0 ??
To maintain it at the 2ish degrees, what sort of average power consumption (say per hour) does it have?
+Joseph Rautenbach Thanks mate. And thanks for sharing the video. I'm hoping to build one of these one day.
Amazing Video can you give block diagram
How did you got 2,3°C? I have a very similar setup and the lowest temperature I could achieve was 14°C on a normal day, and up to 10°C on winter.
Make the system fully air-tight, that is one way to improve cooling efficiency. Having strong & thick insulation is also very important, polystyrene is a great material. But notice in the video his cooling box setup is VERY small inside, that is really the limit which 1 large peltier can keep cool. For bigger size boxes you need multiple large peltiers.
Hi Joseph,
Just wondering what you had the relay on the temperature control board wired up to for this project (K0) & (K1). I couldn’t tell from your video. Thank you for your time, great project!
Nice presentatin, but I have a couple of questions. I have ordered a heatsink with fan and two TEC1-12706 12VDC/5A Peltier modules. I also purchased a Rule 240 inline bilage blower (12VDC) that outputs 235 CFM. I plan to use my cooler for inside my vehicle on a road trip as my current vehicle AC is out but also in a tent when camping. How do y9u deal with the exhaust heat coming off of the back end. How much heat would build up in a small (let's say 10' x 10' x 8' ceiling) do? ALSO< where did you get that temperature control module? Where in the USA can I order one and how much in US Dollars is it? Lastly, what modification(s) did you make to the ATX power supply to keep the power continually running to the device?
I look forward to your reply... best regards... TIM
Is the Fan pushing or pulling the air on the Cold heatsink?
What is between hot side heat sink and cold side heat sink except peltier or thermostat, it is blue in color , i'm making this for my last year project and it doesn't worked well(not going less than 27°)
what is the use of temareture module ?? i mean LED temp detector with relay . why you have used that ???
I have big cool box and I bring peltier 12706 but after when I put it in electric get so much hot and then it's not working any more what should I do for this to make it not so much hot if I bring another one and which one should I bring I want to have it so much cooling under -10 if it's possible and should I bring supply power or what can you tell me please thanks for your time
Like it.Iam also going to try it.if I will get these parts in india. ....
Hi, amazing video, thanks for sharing, just a question, may it this possible to adapt it to work as a air conditioner for a car?, I have looking for a solution to build a cooler system for my bug VW, this cars is not recommended to use conventional air conditioner, they damage engine, so i was thinking it could be a electric air conditioner option, do you think it is possible? thanks a lot in advance... by the way, where I live is a lot of hot (Ecuador, SouthAmerica) thanks and bye...
what is the difference between connecting 3 x 12v yellow wires and 1x 12v yellow wires from power supply ?? any difference in ampere or voltage ?? i see that you have connected 3 x 12v yellow wires from power supply to a barrel jack.
thanks for the reply. your video is straight forward without any clickbaits ..
.i have another question.
there are 6 yellow wires (12v) in power supply & my power supply can deliver 17 amps.
im using a peltier ( 72 watt / 12 = 6amp ) , submersible water pump ( 3watt / 12 = 0.25amp ) , fan = ( 3.6 watt /12 =0.3 amp)
total = 6.55 amp
how many yellow 12v wires do you recommend me to connect together ??
please ping me on shsrm3@gmail.com or here itself..
im doing for an academic project..
Hey just a quick question. Can I use a 5A, 12V laptop power supply? Thanks for the great video btw.
muito bom o seu projeto.
Great video! I was thinking of doing a similar thing to keep my fermenting beer at certain temperatures. My only concern is the condensation on the cold side. How severe is that problem according to you?
hi joseph rautenbach ,can i use heat pipe that are attached to sink instead of fan to reduce the space occupied by fan
i tried this experiment but peltier device feel little cool after few minute water dot on it but not freeze temp . . . . . please let me know may be some technical mistake i did . . .
I have a question
1 fan is to get heat out
what is the function of 2nd fan??
I have an odd question. Is it possible to use the peltier module to switch between the heating and cooling effect, with the help of some device like a temperature controller? What I mean is, I want to create a box that will keep the ambirnt temperature inside at 65 - 70 degrees constantly. So if the temp. drops below 65, the hot side can kick in to heat it....or if the temp. goes above 70, the cooling side will kick in with the help of a heat sink and fan. ...is this at all possible? I don't fully understand how TEGs work.
Hi Joseph, a question please. What is the direction of the fan on the heat side. Does it blow inwards towards the heatsink or outwards away from it. Thanks you.
can someone pls help me. So i have an TEC1-12705 and the same Temperature controller. Now i dont know how to connect all theese up, i tried a lot of variations but the peltier module doesnt work, i have testet, all my 4 peltiers dont work when i connect the power like this for example:
ground : black cable from psu
+12V: Red cable from psu
K1: negative peltier
k0: positive peltier
Check your power supply. You need to put a link in to get a computer power supply to work on its own.
Hey please help me do the fridge project
@@eliassospeter9811 ko must be 12+ and k1 is peltier positive
hie joseph
it would be very kind if could explain how you wired the thermostat
thanks
My Heat sink (Cool Side) was condensing water on it and was not cooling after few minutes.
I guess I am missing some basics of heat transfer here. Anyone who can guide me?
can u show me the connection how u made in between fan,thermostat and peltier
Great project, usefull. What is the voltage of your power supply? Tanks
Tanks bro