DIY Peltier Candle Powered Electric Generator

I used a Peltier cooler and a candle to generate electricity. To learn more about peltier coolers see my other Youtube videos or visit

A thermoelectric device has two different semiconductors alliteratively stacked and connected kind of like little blocks. When current flows through one conductor it will make heat and the other slower conductor it will cool (the Peltier effect) . It is not easy to explain so please visit these links. They may help a little.

Here are a bunch of peltiers on Newark, click show results or check out the datasheets.


SoulreaferDE says:

funny to see someone is squirling toxic cooling paste with his fingers….

electronhacks says:

I put a link in the video description

S and A says:

which peltier model do you use

buz gamery says:

so cool,i love these things

FndASltn says:

400 milliwatts, you should try powering a laser

uietpuchd25 says:

what is the rating of your peltier cooler ?

MrBuntudor says:

Nice work.  I have a log burner installed and will be powering a radio and some light in no time.  Thank you so much. Great video.

John Paul Cavan says:

Hey can i ask if what side should be put on the hot side is it the side with codes or the one with no codes?

Hixxyclips says:

If you measured the current like you did originally but without the fan in circuit it would give you a more accurate reading. Good job btw 🙂

izzzzzz6 says:

are these 12V PELTIER plates? I am looking at 12V 130W plates and i’m wondering how many i would need to generate 14V when sandwiched between out pot belly and the pot of water that sits above, i would make an aluminium sandwich they could sit in in-between the fire and the pot. Thanks.

skankhunt42 says:

So 12 of these wired in series would give 4.8 amps at around 13.92 volts?


JD Punzalan says:

how long does it works?
does it not burn the Peltier module?

TwoEyedPsyclops says:

could you link us to some companies and info? would be extremely appreciated

morpher44 says:

There are some neat energy harvesting chips now that can boost that voltage up higher, and charge a super-cap.

sanshinron says:

As with almost every video containing thermal paste, you use waaaaay to much of it. More thermal paste = worse thermal conductivity. It’s designed to fill microscopic scratches and maximize contact surface so the amount used in this video should be enough for about 20 uses lol.

Zaheer Ahmad says:

what metal use for + and – terminal?

Paul Mathews says:

How to I power a house with this, how many do I need 🙂

50 shades of the dominator says:

lol and the fan that runs from this reaction can also cool the heatsink. You see because this doesn’t work forever unless you cool that heatsink. Eventually the other side of the peltier gets hot and the temerature difference isn’t enough and the thing basically stops working. That is why if you have something to blow air over the heatsink it will just keep going until the candle burns out.

You can get these to work passively but it requires a good design.

Rumen Dimitrov says:

dude u cant measure the voltage of the fan thats as u say 1.1V and then short the cell giving 0.4A and say … yeah its about 0.4W …… check your electronic knowledge … measure the current when the fan is runnig .. not short … then calculate the Watts ….

Alex Arcano says:

It’s working on temperature differential not specifically how hot it can get, the greater the heat difference between the hot and cold side the more power is produced.

Martin Counsell says:

I made something like this when a pettier module was around £30.00 this was 25 years ago, I used a tin can with an air hole for the tea light, and another can on the top filled with water, it worked fine until I upped the temperature and melted the solder junctions in the pettier unit. We now have TEC and TEG units TEG (Thermal Electric Generator rather than C cooler) have a much higher junction temperature ans best used in these applications. I will revisit this again now they are so cheap.

Tarun raj says:

what is the silver color that ur attached to plate

electronhacks says:

@cxaxnxexs Well when the load was removed the voltage jumped up, its like when starting a car the battery voltage will be lower than 12 volts like 10 because of the draw, then remove the load and the voltage returns.

jorge malpica esparza says:

greetings man have you tried to make a solar panel with these ones?

Anthony Veilleux says:

Please learn how to measure amps !

jacky817 says:

What is the specs of the fan you’re using? Im guessing you’re running a 3V fan on 1.16V?

Willian oliveira says:

Son of a bitch

precisioninstruments says:

Do you have to use a heat sink?

Gary Roybal says:


electronhacks says:

@Slovenija12345 the more you cool the more current and voltage you can generate. That heat synch is inadequate.

Kanzler DE says:

I got it that you must provide heat for the peltier to convert it to electricity, but why are you trying to cool it down at the same time with a heat sink and a fan?

Shantel Fullerton says:

You can learn from inplix scripts how to make it yourself.

rainbowsalads says:

wow great stuff.

what life span would you expect from your peltier with this type of set up?

I also wonder if you could insulate the candle side away from the cooling heatsink some more?

Nick Carroll says:

Have you tried to use watercooling? I am thinking about making a similar device but just using a cool pot of water instead of a heat sink. or perhaps a cool pot of water atop the heat sink. +electronhacks

Kanzler DE says:

I got it that you must provide heat for the peltier to convert it to electricity, but why are you trying to cool it down at the same time with a heat sink and a fan?

Danster82 says:

If you created an inclosed Peltier cube with an electic heater in the middle feeding the power to the inside heater and threw it out into the snow would that not create passive heating inside the cube. Just thinking of ways that maybe houses could use the thermoelectric effect to produce extra heating as inside a house is always hotter than outside in the winter so you already have that ambient thermoelectric energy generation but probably just not enough of it.

Mitch T says:

LOL “Pel-ter” – Its pronouced “Pel-tee-ei” Like Jean Charles Athanase Peltier…..

electronhacks says:

Your method would only give us how many watts the fan consumes, not an idea of what the total power output is. I agree that it was not a proper test.

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