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Author Topic: 25mV Joule Thief powered by peltier merely using our body heat -Free energy 24/7  (Read 170802 times)

Offline TinselKoala

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In my video, using the spindle bobbin I put 20 turns on a toroid in a couple of minutes, so you can do 100 turns in ten or fifteen minutes. How long is that?

Free Energy | searching for free energy and discussing free energy


Offline omdano

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Hello magpwr

i have built the whole circuit and it didnt work with a peltier ..
i tied to test it with a AA battery and it worked.. what do you think might be the problem in my case ?

(i didnt put the 100uf cause it said optional)

Edit : it worked but the led didnt look like it was producing any light , i will try to change the gate resistance
« Last Edit: March 08, 2014, 05:31:29 AM by omdano »


Offline xee2

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@ omdano


The Peltier may not produce enough current. Can you try circuit with a power supply? It probably takes a few mA to light the LED at 0.2 volts.





Offline omdano

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I added another peltier to produce more current so now its working fine :p thx


Offline xee2

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I added another peltier to produce more current so now its working fine :p thx


 :)  Congratulations. Can you post a video so others can see how you did it?

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Offline conradelektro

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TinselKoala did some tests with the 2SK170 Joule Thief circuit, see http://www.youtube.com/watch?v=OgndINJHnd0 and http://www.youtube.com/watch?v=35IMWNp2akg

I put the circuit together again and did some scope measurements:

- the power supply was set to about 100 mV (I used only one 2SK170, if one puts 2 or 4 in parallel the supply Voltage can go down to 50 mV)

- note that the 2SK170 has a high resistance when switched through (at least 100 Ohm), the primary winding is therefore never pulled completly to GND

- if one measures over the "LED and the diode" (scope CH 2, at the base resitor) one sees that the LED is switched off and on

- if one measures only over the LED (scope CH 2a) a "ripple current" seems to show up, but this is an artifact because the diode is blocking the scope probe from going more positive

- the supply Voltage should not be higher than 500 mV, the current through the transistor (drain to source) would be too much

- the circuit swings at about 30 KHz, but a scope probe (indicated as CH 2 in the circuit) at the base resistor changes the frequency to about 25 KHz

- if the Toroid has less inductance the frequency will be higher but the supply Voltage has to be higher too (may be 200 mV)

Greetings, Conrad

Offline TinselKoala

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Yes, exactly. That 2a trace is the one. You say this is an artifact caused by the diode, but surely the scope probe is seeing the same thing the LED is seeing on that side of the diode. It looks to me like the LED must be just barely flickering, around its fwd voltage point, dimming and brightening in time to the "ripples" on that signal. I haven't had the time to explore it with a photoresistor to see what the light from the LED is actually doing yet, I got distracted by another project.

You've motivated me to rewind that tiny ferrite bead, though, to see if I can get a lower operating voltage. I think I can get 100 turns onto it, but the wire keeps breaking (it's scrounged wire from a TV yoke).

Since the video, I've put a 1n5711 Schottky diode in place of the 1n34a. It got me a few more millivolts lower but not much. Down at the bottom of this page there is some interesting info on detector diodes.
http://www.techlib.com/electronics/crystal.html

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Offline iii_WARHEAD_iii

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Finally I have found time to assemble suggested circuit from this thread
https://www.youtube.com/watch?v=ozQwneBTRB0

Start up operation voltage 24-25mv with coil from Coilcraft 1:20
Vin ~ 0.076V -> Vout ~ 3.12V
Iin   ~ 1.6mA -> Iout  ~ 0.14ma
Possible to start from 14mv with 1:50, but Vout will be only ~1.4V
Resistance of secondary coil in 1:50 twice bigger than in 1:20
By tuning resistor it is possible to get higher output voltage in addition around 100-200mv, which is enough to compensate hysteresis from second circuit

Second circuit contain Voltage detector BD4930. Due to internal hysteresis Vdet*0.05, LED blinks with 100% power only at V=3.12V. And Tantalum capacitors 470uF and 4.7uF
and I have to replace diode (from graphic card, protective diodes), otherwise I lose 0.7V on it.

What do you think about these transistors, some of them complete analogue of SK170, another have twice bigger conductivity
CPH6904-TL-E    http://de.rs-online.com/web/p/transistoren-jfet/7919403/
2SK2394-7-TB-E http://de.rs-online.com/web/p/transistoren-jfet/7925155/
2SK3557-7-TB-E http://de.rs-online.com/web/p/transistoren-jfet/7925167/
CPH5905G-TL-E  http://de.rs-online.com/web/p/transistoren-jfet/7925278/
TF252-4-TL-H      http://de.rs-online.com/web/p/transistoren-jfet/7919594/
« Last Edit: August 25, 2014, 07:33:56 PM by iii_WARHEAD_iii »

Offline abtahee16

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Can I study with this brightness of light?

Offline Ruturaj

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Hi
I am making a thermoelectric flashlight which works completely from the heat of our hand.I am using a peltier module(TEC1-12706) which is cooled by water.So,can anyone suggest an efficient,working circuit for me please.

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Offline magpwr

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hi everyone,

I have just release one of my sidetracked project and the latest prototype in my youtube channel "sanjev21".
This the first and the only video in youtube release base on DIY project using Body Heat to power up a spinner using a peltier module.

This is also the highest efficiency energy harvesting device which outperform the commercial design. :D
Body Heat to Kinetic -Prototype v2.0 Energy Harvesting device

http://www.youtube.com/watch?v=qDjvQSrOV6c

Please read below to understand what is happening.
-----------------------------------------

After few years of current topic idle it seem certain people are charging high price around $35...$39 base on a prototype design which i have released to public freely merely for replication purpose.
That was just a ver 1.0 design and transformer was merely shrunk using Coilcraft 253P "1:20" SMD transformer.

I have not even bothered to release the improved version 2.0 yet which was already completed few years ago.
It was also a test for me to see if anyone whom is competent enough to improve my released design further.But none seen so far but worst commercialization of my circuit have occured.

http://www.ebay.com/itm/70mV-Joule-Thief-powered-by-peltier-TEG-with-body-heat-green-LED-/222180828198

http://www.ebay.ie/itm/25mV-Joule-Thief-harvesting-powered-by-peltier-TEG-with-body-heat-green-LED-/221935843924

http://www.ebay.com.my/itm/221946116905

You should know who you are.

My intention was free but someone here ruined it for everyone whom simply enjoy circuit building.

Offline Zephir

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Quote
So,can anyone suggest an efficient,working circuit for me please

Ann Makosinski did use power converter integrated circuit, LTC3108 The circuit contained FET’s that would oscillate at voltages as low as 20mV. When used with a recommended   transformer, the IC would provide well over 2.5 volts AC. Such a research here is both reinvention of wheel, both off-topic with respect to overunity.


Offline magpwr

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Ann Makosinski did use power converter integrated circuit, LTC3108 The circuit contained FET’s that would oscillate at voltages as low as 20mV. When used with a recommended   transformer, the IC would provide well over 2.5 volts AC. Such a research here is both reinvention of wheel, both off-topic with respect to overunity.

hi Zephir,

I am using only discrete components and i did mention it produce much higher current output compared to a current commercial unit in my youtube video description.
At 6°C difference i am getting 210uA short circuit current at circuit output.I was trying to prove that my unit is much better than the tested commerical unit which got certain plus points but not in current output.

One of the commercial unit merely deliver 15uA compared that against mine 210uA.There nothing to talk about voltage output around 4volts which is the easy part.Think about it.

Energy given by body as heat is still considered "free energy" where we take "wasted radiated heat" given off from our body 24/7 (If alive) and put it to work.
It's a proof of concept but not necessary efficient.

I am a one man team.

Nothing much to add.

Side story
---------------------------------------------
Electrical power for the New Horizons mission to Pluto is furnished by a single radioisotope thermoelectric generator (RTG), which transforms the heat from the natural radioactive decay of plutonium dioxide into electricity

Offline Zephir

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At 6°C difference i am getting 210uA short circuit current at circuit output

This is still too low - Ann Makosinski (a grade 10 student) got for 50 mV DC from the Peltiers about 6 mA at 5 Volts AC which was sufficient to light the LED. The result was a bright light at 5 degree Celcius of Peltier differential. Yours 210 uA is still at least ten-times worser result. On the web you can find Joule-Thief circuits with silicone (or preferably germanium) transistor in common base configuration, which is capable to oscillate at ~ 30 mV only.

I feel sorry that your design has been stolen - but I'm afraid, it will not work anyway so effectively like the professionally designed integrated circuit mentioned above. Environmental or waste energy recycling isn't overunity, which this forum is all about. Your device still consumes an energy and given the amount of electricity produced the crank dynamo powered battery would be way cheaper solution. Try to replace the lithium battery in ultracheapo crank dynamo flashlight with supercapacitor - and I can assure you, you'll be pleasantly surprised with result.


Offline magpwr

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This is still too low - Ann Makosinski (a grade 10 student) got for 50 mV DC from the Peltiers about 6 mA at 5 Volts AC which was sufficient to light the LED. The result was a bright light at 5 degree Celcius of Peltier differential. Yours 210 uA is still at least ten-times worser result. On the web you can find Joule-Thief circuits with silicone (or preferably germanium) transistor in common base configuration, which is capable to oscillate at ~ 30 mV only.

I feel sorry that your design has been stolen - but I'm afraid, it will not work anyway so effectively like the professionally designed integrated circuit mentioned above. Environmental or waste energy recycling isn't overunity, which this forum is all about. Your device still consumes an energy and given the amount of electricity produced the crank dynamo powered battery would be way cheaper solution. Try to replace the lithium battery in ultracheapo crank dynamo flashlight with supercapacitor - and I can assure you, you'll be pleasantly surprised with result.

hi Zephir,

Since you wanted to debate with me i shall prove 2 things since you wanted to compare me with the little girl.

Firstly the video of mine was released for members in overunity  to replicate on 20th Dec 2012 -Ultra lowest 25mV self starting Joule Thief ver1.0-Free Energy.
-Using single peltier module

The girl video was released on 30 Apr 2013 - The Hollow (Thermoelectric) Flashlight - Google Science Fair
-Using 3 peltier module.


The commerical version "allow short burst in mA" for RF transmission purpose.

I do challenge you or if you can get anyone to try using LTC3108 to "immediately power up the display spinner" at 6°C difference and not in burst after few seconds charging capacitor. ;D ;D ;D

Since i already mentioned mine is better than the commerical unit in output.But Commercial unit got more feature like "supervisory circuit built in".

Yes peltier is not a efficient way to generate electrcity only this i agree from the start.

Yes my device is able to self oscillate at 15mV but i am interested in more power output.

------------------------------
Think about it if every kids use the factory design components then where is the learning curve.No basic foundation is that what you wanted for the future. :D

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