It would be even cooler to make some circuit with posibility to adjust senistivity. Then we can use this for the search of static electricity. Also some explanation of principles would be nice too.
I have watched other negative and positive video's but they either don't show a schematic or it's for something completely different. The close up picture you provide is what I compare to the schematic. As the old saying goes, a picture is worth 1,000 words. Lol anyways can't wait to get started.
Thank you! It works like a charm with very good sensitivity. Can you give me short tip how to add level indicator? Actually when I move hair comb close to circuit it just switch on buzzer/led but I would like to indicate smoothly how close is that hair comb to antenna...
very nice. It was an informative video. Thanks. As you know, static electricity in the card is high voltage. It is worth thousands of volts. However, we do not notice, since there is no current. I want to ask something; How can I make this project to detect the Nano and pico volts, and the detector whose sensing power can be adjusted from the lowest to the highest value?
Thanks a lot for this interesting video , i'm actually working on a similar project , but my question can we use a normal 9 or 12 v transformer ? Can we use it in a normal workbench of electronics assembly ?
TIP: I thought I would offer a little tip. While playing with this awesome project I wanted to run it with a nine volt battery. I ran into a problem with the piezo traumatizing the battery. I took two 10uF electrolytic and put them in parallel across 12volt source and charged them till their belly's were full then I put them in series across the Positive and negative across the piezo. the boost was insane and made all the difference in the world. depending on the piezo you are using they are a real source killer.. don't put the caps in series with the source, it can turn the transistors into crispy critters . don't forget you are doubling up. my piezo is good between 6-26 volts
I thought antennas picked up AC, but static electricity is a DC potential. Why does this work? Is it the movement of the brush that is inducing the voltage onto the antenna?
Ok so I read what you said about adding a transistor in place of the buzzer. I have 2 questions. 1. Where exactly would the placement be for the 1k transistor? Because the buzzer has a positive and negative terminal. So how would you replace buzzer with transistor. 2. How would you place a toggle switch to cut power from the buzzer, so you can turn the buzzer on or off but still have the LED light in working order.?
Please don't confuse resistor and transistor. If you need a switch I recommend doing small modifications to the circuit: First, replace buzzer with 1k resistor, so you just have a resistor and LED conned in sequence, make sure that LED works. Now buzzer: connect plus lead of the buzzer to the wire that connected to plus of the battery, and then connect minus lead on the buzzer to the collector lead of BC547. (collector of BC547 is where LED is connected). If it all works together you can just connect a switch in sequence to the buzzer, the switch will cut power to the buzzer. It doesn't matter where you place the switch, because it is connected in sequence with the buzzer. If something is connected in sequence it doesn't matter what connected first, only polarity is important.
Thanks. Yes, the battery is 12V. I think it should work with a soldering breadboard fine, just don't make gate lead of JFET very long, and it will work ok.
For the negative charge N-channel JFET (J310) is fine, but for the positive, we'll need to use P-channel JFET, and I don't know which one P-channel JFET transistor I am going to use. It is just an idea for now, it requires some testing.
Ok, I have many old curcuit boards out of many different things, hope I can salvage something to work. I love to repurpose things and make new things. It's easy to buy a finished product, but that takes the fun out of it.
Seems the lead acts like an antenna. A meter might be a nice addition through a variable resistor to calibrate it. But calibrate it too what? Perhaps its all just a relative difference and requires some more R and D and Trial and Error to have relevant values. Using a whimshurst machine might make for some interesting values. Perhaps a multi position rotary switch like a multimeter with calibrations resistors on each position might make a variant scale that shows some real differences. Like anything, comparisons and multiples and divisions give relevant values. Hair brush verses whimshurst, verses van der graaf generator, with distance from each might make an interesting research project, with an accurate ruler to keep distance and come up with a hypothesis that has some relative values. For example much of these voltages are too high for a standard meter to connect wires directly. But with this antenna length on the gate of the transistor like device as part of the equation for constant values, there might be a reading worthy of value. It would also likely pick up on wifi? Or perhaps a different length of antenna/wire would mean a different bandwidth? With the cheap taser like modules you can buy on ebay for a few dollars, which say around 500KV that sparks between the two electrodes. It might be interesting to see how close and far away a measurement would be on a metered version. Consistent distances would be necessary. In this day and age of video cameras on many different devices, documenting such experiments would be very easy. I would be very careful not to touch it to such sparking devices, as it would blow components or the meter. I do say I am very much looking for something to measure around 500KV of static volts, as stored in a huge capacitor that has current capacities that can be fatal. Perhaps even a direction antenna with shielding of foil to make a dish reflector.
Great video man, thanks. Please next time use a battery that everyone can buy/get easily, you know like the 9v battery. Because this also helps move this detector around.
@@ElectricalPro you you have any idea how to make simple curcuit REM pod like the ghost hunters use I heard it's done with oscillators?? Any ideas would be great thank you
@@parabugsknowingtheunknown. It is just probably fancier static electricity detector. Why does it need oscillator? Some circuit that I googled indeed use a crystal oscillator, but it has nothing to do with actual detection of signals, it just required to make microcontroller to work, and microcontroller just makes fancy LED blinking.
10K 1/4 resistor will work fine. Buzzer doesn't handle current (amps), it consumes amps, so it doesn't matter what is written on your power supply 1A or 1000A, the buzzer will take just 0,005A and nothing more. (as long as you use 12V)
Hey, man I took the static detector and connected a 12 volt relay which is connected to a toy John deer tractor which when the LED goes off it also activates the relay which starts the tractor. It pretty cool. I tryed to send you a picture of it but youtube won't let me.
I would like to build this to detect static electricity on a printing press.The static reeks havoc in the priinting process. If I used longer leads from the power source, would i still get the same results. Is the a way to use smaller power source to make the detector portable?
Hi, I ordered my j310 jfet transistors and there was 360 number also attached to it. So hope it's the right one. A pack of 5. If I don't use the buzzer do I need a different resistor?
If you don't use a buzzer you need to connect 1k resistor instead of the buzzer, otherwise your LED will burn. You don't need to modify anything except adding a resistor instead of the buzzer. (You can use 0.5K - 10K resistor). I don't know what that 360 number means.
Actually, It detects static electricity. After hair brushing, the hair has the positive charge and the hairbrush has the negative charge. In the video, you can see how this device can sense a negatively charged hairbrush.
Hello, 2N5638 and 2N5639 should work fine (but I haven't tested this circuit with them) I think most of JFET transistor will work here. When I was creating this device I was not choosing what JFET to use, I just used what I could find. If you can't find JFET you can also use 2N7000 MOSFET, I've tested it and it seems to work in a very similar way, but I prefer JFET, it works stable, and more sensitive.
I've googled "REM-POD circuit", and found a circuit that uses IC LM555, if it is REM-POD, then they are not very similar, my circuit is much simpler because I didn't use IC. Is really people hunting ghosts with such devices? lol, I can't believe it.
Hi, although my buzzer is 12V it even works with 4V as well. Yes, you can use a 3V buzzer and power it all with 9V battery. I recommend connecting one more LED sequentially so it will lower the voltage to about 3V for your buzzer. Getting exactly 3V may be tricky, but you will get voltage close to 3V when using 2 blue LEDs and 9V battery.
HI, I have a question, if we just use the buzzer and led, is it a 12 volt LED ? Also I noticed when it stayed on you put your fingers on the antena, to get it to turn off the LED, and buzzer. So is there something I can put in the circuit to make it turn off after say one 10th or two 10ths of a second so as the buzzer will just chirp? Thank you so much for your input.
No, you don't need 12V LED, it is 2V or 3V small 5mm LED. Usually, the buzzer turns off automatically if you move the hairbrush away, watch it at 2:39, but sometimes I think the antenna becomes overcharged or something, and you need to discharge it by touching antenna with one hand and minus lead of the battery with another, and I think nothing we can do here.
I was thinking about a relay to cut the hot side off, but I cannot find a timer that will turn on and off in less than 1 second. Will just have to use it as is until I can think of another way.😀
Wrong. Build it and see. The gate of the FET sloooowly leaks, and eventually the channel turns on. The BJT transistor inverts the FET output, keeping the buzzer turned off. Make R1 much larger, and the project won't need a power switch.
Hello Friend. Is there any scheme to emulate the sound of a rc model motor with a small speaker connected to the output of the receiver to the esc? Something that mimics sound like a motor glow? It serves as It serves as a suggestion for you.
I don't know, but I have an idea... the idea is very simple, but I don't know if it is good... Just try to connect sequentially a small DC motor and a loudspeaker, it will make some noise just like an engine but it is not very loud. And I am not sure that it will be the sound you need, but it is just my idea.
Hi, If you use the same kind of the active buzzer like in the video, then it will work fine with 9V, no need to change anything. Though the buzzer I've used was designed to work with 12V, it also works well from 4V to 12V. LED is an optional component. You can use any 5mm (or similar) LED, red/green/blue etc. I've used 20mA blue 5mm LED.
Assalam ualaikum dear. I subscribe your channel for informative videos, I want to know can I use this device for detecting underground electric cables?
So there is any other circuit that can detect electric cables in walls. I want to use this device for secure and safe work for drilling like lcd stand fixing or any other drilling work that can damage underground electric cables.
Hi, I don't have an answer for that. This device is very sensitive and always behaves strangely. It has something to do with how charged you are positively/negatively, and how charged this device at start, and objects near it... it is hard to tell.
Electrical Projects [Creative Lab] mine does the same when switched on it lights up and when it detects anything the lights go off the thing is the board is using 3 x BC 547 so i think that is the problem do i need the 1x J310 so that the light is off and switches on when it starts detecting electrical charge plus i have 6 leds connected if you can help i would be great full
I've tested this device with IRF540N instead of J310 and it doesn't work, the hairbrush simply has no effect on the device. (IRF540N is N-Channel MOSFET)
Update: It's working with 2N7000, but it has much lower sensitivity compared to J310. The reason why it didn't work with IRF540N is probably because IRF540N has much bigger input capacitance, which is 1960 pF, 2n7000 has just 60pF. So, yes, you can use 2N7000 instead of J310, it works better with long (20 cm) wire connected to gate. (2N7000 is N-Channel MOSFET)
ive made a fair few static meters using the mpf102 is there a way i can add a buzzer to it as well as i use them for ghost hunting and never see them going off because i cant watch them all the time but if i could add a buzzer that would help a lot thanks in advance.
Hello electrical projects... mate ive made 8 of these with quick release switch ,connected to - and antenna,so it grounds itself. Sometimes they work but sometimes the unit will sound and light up doing opposite,meaning when there is no static ,it sounds,even after pressing quick release to ground it.. any idea why the unit would work in opposite way?
Hello, I am not sure, but we can find out what is wrong. Let's do a simple test: Please connect a piece of wire from the base lead to the emitter lead of BC547. (on the circuit it is 'B' and 'E' letters). Does it stop making noise after this?
Hi i have just made the exact thing and having the same problem,however if i place a wire across B and E,then it goes silent,so what am i missing. Im not a electronics person,but love to try this ,cheers.
Hi, if it goes silent, it means that BC547 transistor works correctly. If your device still doesn't work, it only means that something wrong with the transistor J310. Please make sure that your J310 connected correctly. If your J310 is connected correctly and this device still doesn't work, you need replace J310 with a new one.
Hi, I got my j310 jfet in and put it together with 10k in place of buzzer and the led stays on real dem, and will not detect static. Not sure what's the problem
Hi, again. Let's do a test to find out what is wrong. Please disconnect R1 resistor from J310, and if after this your LED still stays on, it means that the problem with BC547. If your LED turns off it means that the problem with J310. Tell me your result.
It went off, so maybe all of those transistors are bad. They have J310 at the top of the transistor and 548 at the bottom, and on the package it says J310 N-channel JFET TO-92. HOPE THESE WERE THE RIGHT ONES.
Try to discharge gate as I did at 2:31 - 2:35, just touch minus and gate at the same time. If it still doesn't work then something wrong with your J310, try one more. Markings are correct: J310 N-channel JFET TO-92, these are the right ones, no doubt about that.
I am using an old pc 200 watt pwr supply. It gives 12 volt 5 volts and 3 volts but might not be exact not sure because I am using a cheap volt meter cen-tech model 69096 and has 20, 300, and 1,000 DC v settings and the reading changes on each one a little. Like a few points..3 or .7 of a volt
deneyi 9 voltla yapmak istiyorum direnc ne kullanmam gerekir led kac volt luk olucak puzzer de kac volt kullanmam gerekiyor zar zor yaptım ötüşü farklı oldu yanmasın diye kapattım
Hi, in theory, it has to react to nearby strikes... but I did not test it... I think it will only detect very close strikes, maybe in 1-2 km radius... but it is just my guess. If you want to detect a thunderstorm that is 100 km away you need to use a radio receiver, long-wave/short-wave receiver will do the job.
Hi, I've used a 12V buzzer that is why I use 12V, but my buzzer can work even with 5V as well... but in this circuit an LED connected sequentially so I'll need a little higher voltage than 5V to make it all work, I'll need at least 7-8V. You can use a 9V battery without any modification of the circuit. If you want to make it work with 5V, first check if you buzzer can work with 5V, if it can, then get rid of the LED, and it will work with 5V. It is possible to make it work from 5V to 16V.
10k resistor is a load for Q1 (j310) transistor, Also it supplies current to the base of the transistor Q2 (BC547) and turns it on. Without that resistor BC547 will be always off.
Hi, I don't know what FET transistor to suggest, I've just used what I had. But I've also tested this device with MOSFET transistor 2N7000 and it worked, but the sensitivity was lower. Well, I think you can try 2N7000.
You can use 1/8 or 1/4 watt resistor, no need for 1/2 watt, but you can use it also. I've just checked my buzzer, it consumes 5 mA at 12V, You can use buzzers with 5 - 30 mA current.
The best way to get electronic components is to open defective devices and unsoldering the components. All you need is a soldering iron and a desoldering pump. I usually buy electronic components. But I also gladly disassemble defective devices and get all components out. This is almost like recycling.
![Electrical Projects [CreativeLab]](http://yt3.ggpht.com/ytc/AIdro_nXuaCebPi8RjzINYxrETo1-K9WQerCEIndpQMoSs0BfQ=s48-c-k-c0x00ffffff-no-rj)
It would be even cooler to make some circuit with posibility to adjust senistivity. Then we can use this for the search of static electricity. Also some explanation of principles would be nice too.
I believe a potentiometer could do this
I have watched other negative and positive video's but they either don't show a schematic or it's for something completely different. The close up picture you provide is what I compare to the schematic. As the old saying goes, a picture is worth 1,000 words. Lol anyways can't wait to get started.
Eu amo o mundo da eletrônica amigo! Ganhasse um inscrito! Continue assim, esses projetos são maravilhosos!
you are totally really cool bro.. nice design ! thank you so much.. nice presentation !
Nice video.I need long range metal detector circuit video.Please.
Use a zener diode to protect the circuit from accidental esd through the gate antenna which will kill the jfet.
Thank you! It works like a charm with very good sensitivity. Can you give me short tip how to add level indicator? Actually when I move hair comb close to circuit it just switch on buzzer/led but I would like to indicate smoothly how close is that hair comb to antenna...
can you make a video with the exact same components except on a solderless breadboard, it would be very helpful
very nice. It was an informative video. Thanks.
As you know, static electricity in the card is high voltage. It is worth thousands of volts. However, we do not notice, since there is no current. I want to ask something;
How can I make this project to detect the Nano and pico volts, and the detector whose sensing power can be adjusted from the lowest to the highest value?
i think he said, increase the length of gate wire to increase sensitivity
Thanks a lot for this interesting video , i'm actually working on a similar project , but my question can we use a normal 9 or 12 v transformer ? Can we use it in a normal workbench of electronics assembly ?
I would think a 9-volt battery would work.
Good work. Please explain how it works?
nice man . thanks and very clever move.
TIP: I thought I would offer a little tip. While playing with this awesome project I wanted to run it with a nine volt battery. I ran into a problem with the piezo traumatizing the battery. I took two 10uF electrolytic and put them in parallel across 12volt source and charged them till their belly's were full then I put them in series across the Positive and negative across the piezo. the boost was insane and made all the difference in the world. depending on the piezo you are using they are a real source killer.. don't put the caps in series with the source, it can turn the transistors into crispy critters . don't forget you are doubling up. my piezo is good between 6-26 volts
I'm trying to do this but failing any chance u can post a video with schematics
Great video man, thanks
Very nice thx ❤❤❤❤
I thought antennas picked up AC, but static electricity is a DC potential.
Why does this work?
Is it the movement of the brush that is inducing the voltage onto the antenna?
Ok so I read what you said about adding a transistor in place of the buzzer. I have 2 questions.
1. Where exactly would the placement be for the 1k transistor? Because the buzzer has a positive and negative terminal. So how would you replace buzzer with transistor.
2. How would you place a toggle switch to cut power from the buzzer, so you can turn the buzzer on or off but still have the LED light in working order.?
Please don't confuse resistor and transistor. If you need a switch I recommend doing small modifications to the circuit: First, replace buzzer with 1k resistor, so you just have a resistor and LED conned in sequence, make sure that LED works. Now buzzer: connect plus lead of the buzzer to the wire that connected to plus of the battery, and then connect minus lead on the buzzer to the collector lead of BC547. (collector of BC547 is where LED is connected). If it all works together you can just connect a switch in sequence to the buzzer, the switch will cut power to the buzzer. It doesn't matter where you place the switch, because it is connected in sequence with the buzzer.
If something is connected in sequence it doesn't matter what connected first, only polarity is important.
Hey bro will it work on 9v battery and what would be registor value for 9v battery
nice idea dear good
Shouldn’t it be grounded to detect charge? How does it detect a potential difference without any reference?
Substitute j310 ?
Really nice! The battery is 12v, right? And is it possible to make it using a soldering breadboard? Or there could be some problem to it? Thanks!
Thanks. Yes, the battery is 12V. I think it should work with a soldering breadboard fine, just don't make gate lead of JFET very long, and it will work ok.
@@ElectricalPro Интересно, можно ли этой штукой обнаружить "подселенца" или лярву на ауре человека?
Ведь эти друзья на человека электричеством влияют.
Thank you very much
As soon as you post it I will start working on it immediately. Can I use the same transistors for the project?
For the negative charge N-channel JFET (J310) is fine, but for the positive, we'll need to use P-channel JFET, and I don't know which one P-channel JFET transistor I am going to use. It is just an idea for now, it requires some testing.
Ok, I have many old curcuit boards out of many different things, hope I can salvage something to work. I love to repurpose things and make new things. It's easy to buy a finished product, but that takes the fun out of it.
Does this work with a 9v power source?
Seems the lead acts like an antenna. A meter might be a nice addition through a variable resistor to calibrate it. But calibrate it too what? Perhaps its all just a relative difference and requires some more R and D and Trial and Error to have relevant values.
Using a whimshurst machine might make for some interesting values. Perhaps a multi position rotary switch like a multimeter with calibrations resistors on each position might make a variant scale that shows some real differences. Like anything, comparisons and multiples and divisions give relevant values. Hair brush verses whimshurst, verses van der graaf generator, with distance from each might make an interesting research project, with an accurate ruler to keep distance and come up with a hypothesis that has some relative values. For example much of these voltages are too high for a standard meter to connect wires directly. But with this antenna length on the gate of the transistor like device as part of the equation for constant values, there might be a reading worthy of value. It would also likely pick up on wifi? Or perhaps a different length of antenna/wire would mean a different bandwidth?
With the cheap taser like modules you can buy on ebay for a few dollars, which say around 500KV that sparks between the two electrodes. It might be interesting to see how close and far away a measurement would be on a metered version. Consistent distances would be necessary. In this day and age of video cameras on many different devices, documenting such experiments would be very easy. I would be very careful not to touch it to such sparking devices, as it would blow components or the meter. I do say I am very much looking for something to measure around 500KV of static volts, as stored in a huge capacitor that has current capacities that can be fatal. Perhaps even a direction antenna with shielding of foil to make a dish reflector.
PS I liked it and subscribed ;)
Great video man, thanks.
Please next time use a battery that everyone can buy/get easily, you know like the 9v battery.
Because this also helps move this detector around.
Hi, without any modification of the circuit, this device can work with 9V battery as well. Thanks!
@@ElectricalPro you you have any idea how to make simple curcuit REM pod like the ghost hunters use I heard it's done with oscillators?? Any ideas would be great thank you
@@parabugsknowingtheunknown. It is just probably fancier static electricity detector. Why does it need oscillator? Some circuit that I googled indeed use a crystal oscillator, but it has nothing to do with actual detection of signals, it just required to make microcontroller to work, and microcontroller just makes fancy LED blinking.
@@ElectricalPro thank you also is this a positive or a negative static detector
@@parabugsknowingtheunknown. If I understood everything correctly it is a negative static detector.
Nice project
jfet can replace with what component?
Sir, what if i dont have J310, what materials would i subtitute?
Also, is it okay to use 1 watt resistor?
Is this sensitive enough to use to test the static charge on n95 masks?
how to check for Negative or Positive polarity ..
*can this be a lightning detector?*
Can I use 2N5457 instead of J310? It doesn't seem to work.
Hello i have made this but it just constantly goes off with alarm and light and does not stop ... Do you know why this is ?
Very good!!! Tank .....
Very good but I need seen Gold detect make easy
is this detector just for hair brush? if i wanna detect mobile key or something else so how? & what to do?
J310 equivalent remplacement?
Thank you sir,but how to increase detection distance of circuit for 230v .
А будет работать в схеме полевик от электретного микрофона ?
Lightning detecter?
how would you make it with antenna so when you near antenna it goes off? and lower the sensitivity a bit?
Did you use a 10 k 1/4 or 1/2 watt resistor and also how many amps will your buzzer handle?
10K 1/4 resistor will work fine. Buzzer doesn't handle current (amps), it consumes amps, so it doesn't matter what is written on your power supply 1A or 1000A, the buzzer will take just 0,005A and nothing more. (as long as you use 12V)
So... 2m is 30cm for you?
Hey, man I took the static detector and connected a 12 volt relay which is connected to a toy John deer tractor which when the LED goes off it also activates the relay which starts the tractor. It pretty cool. I tryed to send you a picture of it but youtube won't let me.
I am glad that you are having fun with this project :)
Metal detector ?
JFET J310 tranjiter nhi mil rha h is ki jagh dusra kon sa lga skte h
Интересно, можно ли этой штукой обнаружить "подселенца" или лярву на ауре человека?
Ведь эти друзья на человека электричеством влияют.
Where is the schematic diagram to make this right? Oh I found it, it's 0:39 Thanks.
Do you use the circuit to detect metals or not
could you provide the woring of such detectors
I would like to build this to detect static electricity on a printing press.The static reeks havoc in the priinting process. If I used longer leads from the power source, would i still get the same results. Is the a way to use smaller power source to make the detector portable?
Do you have a static eliminator?
Sir please guide me for appropriate changes for using 9v battery
As this 9v small battery is easy to carry anywhere
Hi, no need to make any changes, it will work fine with 9V battery without any modification of the circuit.
How much static was that @ certain distance?
Does it matter which end of the 10k resistor is connected the j310..??
It doesn't matter. Resistors don't have polarity.
Hi, I ordered my j310 jfet transistors and there was 360 number also attached to it. So hope it's the right one. A pack of 5.
If I don't use the buzzer do I need a different resistor?
If you don't use a buzzer you need to connect 1k resistor instead of the buzzer, otherwise your LED will burn.
You don't need to modify anything except adding a resistor instead of the buzzer. (You can use 0.5K - 10K resistor).
I don't know what that 360 number means.
Je ne trouve pas trenstor 310
Is that a metal detector
What device does the device detect? Plastic, metal, iron?
Actually, It detects static electricity.
After hair brushing, the hair has the positive charge and the hairbrush has the negative charge.
In the video, you can see how this device can sense a negatively charged hairbrush.
Hello, I can not find transient J310 (N-channel JFET) in my country, can I replace it with a similar one? Thank you
Hello, 2N5638 and 2N5639 should work fine (but I haven't tested this circuit with them) I think most of JFET transistor will work here. When I was creating this device I was not choosing what JFET to use, I just used what I could find.
If you can't find JFET you can also use 2N7000 MOSFET, I've tested it and it seems to work in a very similar way, but I prefer JFET, it works stable, and more sensitive.
Thank you very much for answering, this circuit by what I see, is very similar to the REM-POD to hunt ghosts right? I congratulate you for your work.
I've googled "REM-POD circuit", and found a circuit that uses IC LM555, if it is REM-POD, then they are not very similar, my circuit is much simpler because I didn't use IC. Is really people hunting ghosts with such devices? lol, I can't believe it.
If hunting ghosts is popular activity then I can build an even better device.
Yes of course, yes, if you can do something to hunt ghosts, I would appreciate it very much.
What voltage is your power source as you have 12v buzzer could I use the same curcuit with 3v buzzer and 9v battery
Hi, although my buzzer is 12V it even works with 4V as well. Yes, you can use a 3V buzzer and power it all with 9V battery. I recommend connecting one more LED sequentially so it will lower the voltage to about 3V for your buzzer. Getting exactly 3V may be tricky, but you will get voltage close to 3V when using 2 blue LEDs and 9V battery.
Oh also, where is a good place to order them if I need more?
I have no idea, just google it. I buy in some local internet stores.
HI, I have a question, if we just use the buzzer and led, is it a 12 volt LED ?
Also I noticed when it stayed on you put your fingers on the antena, to get it to turn off the LED, and buzzer. So is there something I can put in the circuit to make it turn off after say one 10th or two 10ths of a second so as the buzzer will just chirp?
Thank you so much for your input.
No, you don't need 12V LED, it is 2V or 3V small 5mm LED. Usually, the buzzer turns off automatically if you move the hairbrush away, watch it at 2:39, but sometimes I think the antenna becomes overcharged or something, and you need to discharge it by touching antenna with one hand and minus lead of the battery with another, and I think nothing we can do here.
I was thinking about a relay to cut the hot side off, but I cannot find a timer that will turn on and off in less than 1 second. Will just have to use it as is until I can think of another way.😀
what's the use of this? if any object can detect by this innovation it will continuously buzz.
Wrong. Build it and see. The gate of the FET sloooowly leaks, and eventually the channel turns on. The BJT transistor inverts the FET output, keeping the buzzer turned off. Make R1 much larger, and the project won't need a power switch.
Hello Friend. Is there any scheme to emulate the sound of a rc model motor with a small speaker connected to the output of the receiver to the esc? Something that mimics sound like a motor glow? It serves as It serves as a suggestion for you.
I don't know, but I have an idea... the idea is very simple, but I don't know if it is good...
Just try to connect sequentially a small DC motor and a loudspeaker, it will make some noise just like an engine but it is not very loud. And I am not sure that it will be the sound you need, but it is just my idea.
Sir, can it sense AC power line within 2 meters ? Reply fast sir urgent requirement
Hi, probably not, or maybe it can if it is 30kV or something. It will not react to 230V for example.
Sir can I increase the antenna length up to 100cm .if can sense detection of electric field with in 2m
It detects static electricity, but in your case I think you need something different.
Hard to see from moving so fast and hand in the way
how could i build this using 9volts and what are the specs on the led just want to make sure i get theright one
Hi, If you use the same kind of the active buzzer like in the video, then it will work fine with 9V, no need to change anything. Though the buzzer I've used was designed to work with 12V, it also works well from 4V to 12V. LED is an optional component. You can use any 5mm (or similar) LED, red/green/blue etc. I've used 20mA blue 5mm LED.
Is it possible to do this on a solder less breadboard
Yes, it is possible.
Is this detector suitable for searching for coins in the dirt?
Assalam ualaikum dear. I subscribe your channel for informative videos, I want to know can I use this device for detecting underground electric cables?
Wa alaikum assalam. This device only can detect static electricity, so no, unfortunately you will not be able to detect underground wires with it.
@@ElectricalPro ....thnks dear
So there is any other circuit that can detect electric cables in walls. I want to use this device for secure and safe work for drilling like lcd stand fixing or any other drilling work that can damage underground electric cables.
I've never tried to build something like that, so I don't know. Try to google it, maybe you will find something good.
Ok ..you are from where?
Why does the ones i make,work in reverse, they turn off when im near and sound when im not near it with static charge?
Hi, I don't have an answer for that. This device is very sensitive and always behaves strangely. It has something to do with how charged you are positively/negatively, and how charged this device at start, and objects near it... it is hard to tell.
Electrical Projects [Creative Lab] thanks for that:) have you made a more stable device that sounds and light when static is detected?
Not yet, I have a couple of ideas... hopefully, I'll make it in the future :)
Electrical Projects [Creative Lab] mine does the same when switched on it lights up and when it detects anything the lights go off the thing is the board is using 3 x BC 547 so i think that is the problem do i need the 1x J310 so that the light is off and switches on when it starts detecting electrical charge plus i have 6 leds connected if you can help i would be great full
Thanks for sharing
Can you test this with Others mosfet for replacement of j310
I've tested this device with IRF540N instead of J310 and it doesn't work, the hairbrush simply has no effect on the device. (IRF540N is N-Channel MOSFET)
Update: It's working with 2N7000, but it has much lower sensitivity compared to J310. The reason why it didn't work with IRF540N is probably because IRF540N has much bigger input capacitance, which is 1960 pF, 2n7000 has just 60pF. So, yes, you can use 2N7000 instead of J310, it works better with long (20 cm) wire connected to gate. (2N7000 is N-Channel MOSFET)
Thanks for testing
ive made a fair few static meters using the mpf102 is there a way i can add a buzzer to it as well as i use them for ghost hunting and never see them going off because i cant watch them all the time but if i could add a buzzer that would help a lot thanks in advance.
Hello electrical projects... mate ive made 8 of these with quick release switch ,connected to - and antenna,so it grounds itself. Sometimes they work but sometimes the unit will sound and light up doing opposite,meaning when there is no static ,it sounds,even after pressing quick release to ground it.. any idea why the unit would work in opposite way?
I need detection of AC power line electric field
Did mine exactly as shown and it wont shut off. Soon as i add power it lights and sounds. What am i missing?
Hello, I am not sure, but we can find out what is wrong.
Let's do a simple test: Please connect a piece of wire from the base lead to the emitter lead of BC547. (on the circuit it is 'B' and 'E' letters). Does it stop making noise after this?
Hi i have just made the exact thing and having the same problem,however if
i place a wire across B and E,then it goes silent,so what am i missing.
Im not a electronics person,but love to try this ,cheers.
Hi, if it goes silent, it means that BC547 transistor works correctly. If your device still doesn't work, it only means that something wrong with the transistor J310. Please make sure that your J310 connected correctly. If your J310 is connected correctly and this device still doesn't work, you need replace J310 with a new one.
Hi Many thanks for the info,i will replace it and let you know.
Thanks.
steve
Not working please explain
Hi, I got my j310 jfet in and put it together with 10k in place of buzzer and the led stays on real dem, and will not detect static. Not sure what's the problem
Hi, again. Let's do a test to find out what is wrong. Please disconnect R1 resistor from J310, and if after this your LED still stays on, it means that the problem with BC547. If your LED turns off it means that the problem with J310. Tell me your result.
It went off, so maybe all of those transistors are bad. They have J310 at the top of the transistor and 548 at the bottom, and on the package it says J310 N-channel JFET TO-92. HOPE THESE WERE THE RIGHT ONES.
Try to discharge gate as I did at 2:31 - 2:35, just touch minus and gate at the same time. If it still doesn't work then something wrong with your J310, try one more. Markings are correct: J310 N-channel JFET TO-92, these are the right ones, no doubt about that.
I did notice that my power source is 12.6 to 12.7 volts could that blow the J310?
I am using an old pc 200 watt pwr supply. It gives 12 volt 5 volts and 3 volts but might not be exact not sure because I am using a cheap volt meter cen-tech model 69096 and has 20, 300, and 1,000 DC v settings and the reading changes on each one a little. Like a few points..3 or .7 of a volt
deneyi 9 voltla yapmak istiyorum direnc ne kullanmam gerekir led kac volt luk olucak puzzer de kac volt kullanmam gerekiyor zar zor yaptım ötüşü farklı oldu yanmasın diye kapattım
define cubukları başarılı oldun mu şuanda projede
define cubukları zener diyot kullan ve satıcıya kaç voltu kaç voltla düşüreceğini söyle ona göre versin
DEFİNE CUBUKLARINDA BAŞARIYA ULAŞTIM KENDİM ÜRETİYORUM TESTLER BANA AİT
define cubukları bu devre sadece plastik için mi geçerli
an this be a lightning detector?
Hi, in theory, it has to react to nearby strikes... but I did not test it... I think it will only detect very close strikes, maybe in 1-2 km radius... but it is just my guess. If you want to detect a thunderstorm that is 100 km away you need to use a radio receiver, long-wave/short-wave receiver will do the job.
what is the code word of those 2 transmitter
Transmitter?... You mean transistors... J310 (N-channel JFET) and BC547B (NPN bipolar transistor)
Does it have to be 12v can it be lower
Hi, I've used a 12V buzzer that is why I use 12V, but my buzzer can work even with 5V as well... but in this circuit an LED connected sequentially so I'll need a little higher voltage than 5V to make it all work, I'll need at least 7-8V. You can use a 9V battery without any modification of the circuit. If you want to make it work with 5V, first check if you buzzer can work with 5V, if it can, then get rid of the LED, and it will work with 5V. It is possible to make it work from 5V to 16V.
Brilliant thankyou for your reply :)
Can I just confirm what the 10k resistor does...
10k resistor is a load for Q1 (j310) transistor, Also it supplies current to the base of the transistor Q2 (BC547) and turns it on. Without that resistor BC547 will be always off.
Can this sense matel
Do this project with battery 9v 3v?
For this device, you will need 12V or 9V battery. With 3V battery it probably will not work.
Electrical Projects [Creative Lab] okey
please sir can it detect metal?
Hi, no, it can only detect static electricity
thanks for your reply sir
J310 TO-92 IC Is it OK???
yes
Hi can make metal detector
👍👏
Sorry sir I cant see it perfectly 🙏
heh j310 is not available...can u suggest any other fet
...i need it fast
Hi, I don't know what FET transistor to suggest, I've just used what I had.
But I've also tested this device with MOSFET transistor 2N7000 and it worked, but the sensitivity was lower.
Well, I think you can try 2N7000.
What's the value of the resistor if you use 4 Led plus buzzer?thanks
The same value. Sorry for the late response. I've missed your comment.
Is the resistor 1/4 watt or 1/2 watt and how many amps should the buzzer handle?
You can use 1/8 or 1/4 watt resistor, no need for 1/2 watt, but you can use it also.
I've just checked my buzzer, it consumes 5 mA at 12V, You can use buzzers with 5 - 30 mA current.
Invite time machine banane ke liye batao
I don't have a transistor😧😭😔
The best way to get electronic components is to open defective devices and unsoldering the components. All you need is a soldering iron and a desoldering pump. I usually buy electronic components. But I also gladly disassemble defective devices and get all components out. This is almost like recycling.
www.banggood.com/200pcs-10-Values-Transistors-Pack-Transistor-Assortment-Kit-With-Storage-Box-p-1070201.html
make a metal detector
Hy
li mead it but it on carrot wai
Dairkt
Ngomong opo mening
olá amigo nada a ver isso e fraud
lmao
Is it possible to do with 2 jfet?