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Author Topic: 25mV Joule Thief powered by peltier merely using our body heat -Free energy 24/7  (Read 235069 times)

Offline conradelektro

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Hi conradelektro,

Interesting oscillator circuit using ALD mosfet.

I was curious about the efficiency for the ALD based circuit.
Using :200mV x 250uA (Found in uploaded image)

I used VoltsxI(Amps) =0.2v x 0.00025A =0.00005 watts or 50mW (Current consumption to light led)

I then try to apply for my 2SK170 circuit VxI =60mV x4.2mA=0.00000252 watts or 2.52mW(Current consumption to light led)

But i noticed my circuit current draw is higher for lower voltage requirement although efficiency wise the 2SK170 base circuit looks better.
Maybe it make sense why ALD mosfet is preferred choice for  radio.

These are my calculations:

circuit with 2SK170: 60 mV and 4.2 mA --> 0.06 x 0.0042 = 0,000252 = 252µW (LED is fairly bright)

circuit with ALD110900: 200 mV and 250µA --> 0,2 x 0.000250 = 0,00005 = 50 µW (LED just glows)

My simple earth battery delivers about 1.2 mA short circuit current, which would be too little for the 2SK170 circuit, even at 60 mV.

I just measured the ALD110900 circuit at my earth battery again (0.5 meter copper and aluminium tube next to each other in the ground): 0.53 Volt and 540 µA --> 280 µW.

It just happens that the ALD110900 circuit is perfect for my simple earth battery because the earth battery delivers up to 0.9 Volt but very little current.

For other applications, like a Peltier Element, the 2SK170 circuit is better, because a Peltier Element delivers quite some current even while its Voltage stays low (below 100 mV). At 200 mV the 2SK170 circuit draws already too much power (about 14 mA).

Here my measurements of the two circuits:

2SK170 circuit:  50 mV -- 2.2 mA , 100 mV -- 6 mA , 200 mV -- 14 mA , 500 mV -- 34 mA (I would say, above 200 mV the circuit is not useful any more.)

ALD110900 circuit: 180 mV -- 200 µA , 200 mV -- 250 µA , 1 V -- 1.2 mA ,  1.5 V  -- 1.25 mA (I would say, between 200 mV and 1.5 V the circuit is useful in case one wants a very limited current draw. Of course, the LED is never very bright.)

Greetings, Conrad

Free Energy | searching for free energy and discussing free energy


Offline magpwr

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hi everyone,

My experiment using copper tube with 7 toroid wrap around it was a failure using 2SK170 with toroid 4:100 using peltier as power source.

However if i try connecting (copper tubes toroid) in series with same(100:4) toroid at pri 4 turns powered by 1.5 battery instead of peltier it works.I was able to light 10mm led quite brightly if i tap power source from within the copper tubes using a straight 18AWG.The led only lit one way only.

Using 2n4401 or 2n22222 transistor instead of 2SK170 if i'm using 1.5v battery.

Latest finding-Please taken note the copper tube/ferrite combination only works well in "high frequency".

« Last Edit: February 09, 2013, 02:18:35 PM by magpwr »

Offline jp08

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is JT can boost the voltage to 5V-12V with high output current w/c will charge the ultracapacitor quickly using  TEG(1.65V @ 16A)

Free Energy | searching for free energy and discussing free energy

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Offline conradelektro

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Now J.L. Naudin does some experiments with this strange "transformer" (many toroids on a copper tube):

http://jnaudin.free.fr/dlenz/indexen.htm  (the video shows schematics of the test circuit)

http://jnaudin.free.fr/dlenz/DLE01en.htm (also shows the schematics and construction details)

My own tests just showed that a lot of current is necessary to light a few LEDs; more power than lighting the LEDs directly.

I do not understand what Naudin sees in his experiment? It is an interesting "transformer", but to light a 10 Watt lamp with 80 Watt input is not very efficient.

A dynamic system can easily show less power draw under load as long as the input exceeds the output by a huge factor. The impedance (dynamic resistance) of a system changes when the magnetic properties change. And putting a load on this "transformer" will change its magnetic properties.

But there might be something I do not understand, could someone explain the expectations people have in connection with this "transformer"?

Greetings, Conrad

Offline DreamThinkBuild

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Hi Conrad,

I just seen these heat pads that work off 5vdc, 600ma.

5x10cm
https://www.sparkfun.com/products/11288

5x15cm
https://www.sparkfun.com/products/11289

Video:
http://youtu.be/WdNAQIR5iSI?t=10s

Wonder if you could insulate/sandwich it with a high R value on one side of the peltier cell and pulse it with 5-12vdc to maintain the temp.

Well, back to shoveling, got about 33" of snow.

The shed failed, :o at least the furnace didn't get damaged.

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Offline e2matrix

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Yikes DTF!    :o   Glad you are okay and hopefully still have power there.   It's times like this everyone could really benefit having a good independent-of-the-grid energy source. 

Offline conradelektro

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@DreamThinkBuild: very nice picture of the snow chaos in your garden, hope you will be able to clean up without too much trouble.

The heating elements are very nice and interesting, because they seem so sturdy and easy to use.

But I would not heat up (or cool down) a Peltier Element by help of electricity because the efficiency of a Peltier Element lies between 4% and 7%. So, one wants to use heat (or cold) which is just there for free like from the sun or the warmth from a combustion engine or the cold from the snow.

Greetings, Conrad

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Offline scratchrobot

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Offline conradelektro

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I made a mini version  :)

http://www.youtube.com/watch?v=wbfd0k8FzmE

@scratchrobot: very nice build.

How long does it take till the cold side of the Peltier Element (which is not touching your body) becomes as warm as your body and the LED stops glowing?

The experiments I did (either with body warmth or with heat from an oven or with heat from candles) showed that cooling is the big problem. It is very difficult to keep the cold side of the Peltier Element cold (after a few minutes).

One would have to pump a lot of cold water passed the cold side to transport the heat away. In real technical solutions one sees very big heat exchangers.

Greetings, Conrad

Free Energy | searching for free energy and discussing free energy


Offline scratchrobot

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@scratchrobot: very nice build.

How long does it take till the cold side of the Peltier Element (which is not touching your body) becomes as warm as your body and the LED stops glowing?

The experiments I did (either with body warmth or with heat from an oven or with heat from candles) showed that cooling is the big problem. It is very difficult to keep the cold side of the Peltier Element cold (after a few minutes).

One would have to pump a lot of cold water passed the cold side to transport the heat away. In real technical solutions one sees very big heat exchangers.

Greetings, Conrad

It runs only for about a minute or so, i also tried the other side of the peltier against the window to cool it and get about the same runtime,
Maybe if i keep one side warm with my body and cool the other side against the window it keeps running  :)

Greetings

Offline magpwr

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Hi scratchrobot,

Nice work.

That was the main intention for creating this circuit.
If you mounted small chipset heatsink which cover the peltier surface area and strap peltier around wrist using a sport band maybe with only small heatsink eg:used in chipset cooling.Then as we move(Our body generate even more heat) the small  heatsink sticking out of sport band will dissipate heat nicely and generate power on the go 24/7 (Day or night)with no mechanical wear and tear.I think this unit could last for many years or decades.
It's better to get peltier which have silicon seal at the side to prevent any moisture from entering unit which may degrade performance over time due to corrosion.

Another alternative to mount peltier unit in hat with few thin metal like copper plates in hat stretch in hat like flat finger over head and with rather flat heatsink sticking out at the back of hat or towards the back of hat.This will look more like military self charging unit,maybe in my vision.If  any electronics equipment on hat not in use.The unit will trickle charge batteries 24/7.

I have attached the image of heatsink on peltier which the 2 mounting part sticking out which could be easily removed with a Flat-nose pliers.

Free Energy | searching for free energy and discussing free energy


Offline Dark Alchemist

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http://www.overunity.com/13175/25mv-joule-thief-powered-by-peltier-merely-using-our-body-heat-free-energy-247/dlattach/attach/119721/

I ran this up in Multisim 12 (gives a lot more control for transformers) and it refused to work.  Could you upload the Multisim 10 files for this, Magpwr, as it could be something I did or the new transformer is not like the old one (your transformer was in 10 but now in 12 has been completely removed).

Offline magpwr

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http://www.overunity.com/13175/25mv-joule-thief-powered-by-peltier-merely-using-our-body-heat-free-energy-247/dlattach/attach/119721/

I ran this up in Multisim 12 (gives a lot more control for transformers) and it refused to work.  Could you upload the Multisim 10 files for this, Magpwr, as it could be something I did or the new transformer is not like the old one (your transformer was in 10 but now in 12 has been completely removed).

hi,

I can only provide you the screen shot and the video.
Please observe the transformer used.It's the only one which works in this tool at the lowest possible voltage. :D

Best place to buy 2SK170 after searching high and low in internet is http://www.futurlec.com/Transistors/2SK170.shtml  $0.20 ea   (Please type 2SK170 in search for that site to purchase.It was not listed)
In ebay it priced much higher.

Offline Dark Alchemist

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Well, that sucks because, as I said, that transformer has been removed from newer versions of Multisim.  If I can't simulate it myself I will not even attempt to make it so I was hoping you had the circuit I could see what Multisim 12 does with it but if you don't then I will just have to watch the video and move on to something else.

Thanks for your response.

Offline Legalizeshemp420

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2SK170 is now classified as obsolete so we need a replacement for that part.

Since I couldn't get your transformer in MS 12 due to it being removed by National I moved on from this project but not from the goal.

 

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