25mV Joule Thief powered by peltier merely using our body heat -Free energy 24/7

[magpwr]

Hi Scratchrobot,

The input capacitor is 100uf and output i'm using 1uf(105 written on cap) for quick increase in voltage you could use higher cap like 100uf at output stage as well and notice how fast the voltage will increase.
Or if your are just powering led 100nf caps will do as well at the output stage.

The toroid and circuit could be shrunk alot more ,it's up to individual builder. Prototype is always bigger/ugly initially since we don't know if it would work the way we want it.


I am indeed  bad at hand writing  rarely get the chance to write these days unless i am filling in some official document.

[scratchrobot]

Hi Scratchrobot,

The input capacitor is 100uf and output i'm using 1uf(105 written on cap) for quick increase in voltage you could use higher cap like 100uf at output stage as well and notice how fast the voltage will increase.
Or if your are just powering led 100nf caps will do as well at the output stage.

The toroid and circuit could be shrunk alot more ,it's up to individual builder. Prototype is always bigger/ugly initially since we don't know if it would work the way we want it.

I am indeed  bad at hand writing  rarely get the chance to write these days unless i am filling in some official document.

I'm waiting for my fets to arrive and when i have them i will build your circuit and report back here.
Thanks again for sharing your circuit.

[scratchrobot]

The Fets arrived and i tried replicating your circuit but without succes. I will try making another coil.

[TinselKoala]

Be sure to try all combinations of coil connections before you change other stuff. Say you have coil A with connections 1 and 2, and Coil B ditto.
So you have 4 possible ways to hook up the coils; two should work and two won't, and of the two that do, one might be a little better.

[conradelektro]

I like this circuit and the use of peltier elements.

Unfortunately I have to get this special transistors before I can start experimenting. I have a good collection of peltier elements. My idea is to stick the peltier element to a cold window glass and a longish aluminium "heater" warmed up by the air in the warm room.

The use of 4 transistors is still a riddle for me: my guess is that one transistor would suffice once the one amongst the four is found which switches most easily with this low Voltage and low current at the base. But I could be wrong. The argument, that 4 transistors give more power than 1 in case they do not switch on nicely is not very good, because 4 times very low power would still not be enough. The trick is to make the transistor switch on inspite of low Voltage and low current at the base. Once that is achieved, it does not matter whether it is 1 or 4 transistors. There could be a strange interaction between the bases of the four transistors, but this seems to be esotheric. What ever, in case 4 work, why not.

Greetings, Conrad