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

[scratchrobot]

 a "coffee or tea cup temperature indicator"

Nice idea!

[magpwr]

Hi,

I figured out in order to find out at which low voltage the JFET base joule thief starts oscillation if we don't have an oscilloscope.We could use piezo speaker only provided the frequency is running at <20KHZ for sound to be heard.
It doesn't matter if we don't hear anything since we could use Led as simple indicator.

There is another plan which i have in my mind which i'm planning on doing to increase output power from 25mV joule thief with <4mA current draw.
Please look at the youtube videos by searching for the 2 youtube user "name" indicated below first(Please jump to last paragraph at the bottom then come back here) .To understand i'm really talking about.
The plan is to connect the copper pipe with toroid like shown in video.One end of copper pipe with 6 toroid around it goes to the JFET Drain and other end of copper pipe goes to primary coil.

The reason why i'm planning this is because if you think "copper pipe" by itself which means impedance is very very low likely below 0.01 Ohms for a short copper pipe.right...
The Larskro circuit with copper pipe\toroid combination as shown below somehow reveal that with even such a very low Ohms between copper pipe not to mention the micro voltage if any exist on copper pipe during operation is very very tiny.Yet the output from inside the copper pipe could light Leds brightly.
My observation of those video as shown below from my perspective the circuit using 1.5volt merely serve as "oscillator" for the copper pipe/toroid combination.
Since 25mV JFET base circuit\Joule Thief is also a Oscillator/ultra low voltage version . If we connect to (one end of copper pipe between primary coil and JFET drain).This pipe with toroid around it in theory would "resonate" as well and in theory produce more power to light LED or many leds .Maybe we could even stepped up voltage from there from the pipe,but not figured out yet if need too.

Hence no power need to be tapped from the Gate of JFET like in current circuit example to power Led since this time more power is produce from within the copper pipe/toroid to light more leds (theory).





I have received the toroids but i need to find time over weekend to go to hardware shop to get  2 type of smaller copper pipe to fit 2 version of toroid shown in video link below.In theory this may be even more efficient.

Youtube user "Larskro" Title "Resonant LCR Amazing Circuit 2" or same tube user- Title "Amazing Circuit duplication of Larskro YT-video"
Youtube "capindres" "Double Amazing Joule Thief video" (A big improvement over Larskro's version 100++ really bright Led on 1xAA)

Those toroids base on the 3 videos are purchased from here.
http://www.cwsbytemark.com

[conradelektro]

@magpwr: please look at the attached circuit. Is this what you imagine?

Greetings, Conrad

[magpwr]

Hi Conradelektro,


It should still be based on the original circuit design for 25mV joule thief.The one you have posted recently in this forum.But this  time connection will  be "JFET (drain\collector) to (one end of copper pipe ,then another end of copper pipe)  to toroid 4 turns " in series.

Original connection is JFET Drain\collector directly connected to toroid 4 turns(Which is already less than 1 Ohms).

The (100:4)toroid is still needed to serve as oscillator to resonate copper pipe with 6 toroid around it.

[conradelektro]

Hi Conradelektro,

It should still be based on the original circuit design for 25mV joule thief.The one you have posted recently in this forum.But this  time connection will  be "JFET (drain\collector) to (one end of copper pipe ,then another end of copper pipe)  to toroid 4 turns " in series.

Original connection is JFET Drain\collector directly connected to toroid 4 turns(Which is already less than 1 Ohms).

The (100:4)toroid is still needed to serve as oscillator to resonate copper pipe with 6 toroid around it.

@magpwr: in case the toroid should stay in the circuit as you describe, I would put the usual bifilar 10 turns on the toroid, because the 100 turns for the Gate are only needed to lift the Voltage above the 2.2 Volt level for the diode. Since the diode will be fed via the copper tube, this Voltage lift at the Gate of the transistor is not needed any more.

I am always a bit reluctant to let the Gate of a transistor go much below the Source (or the Base below the Emmiter in an NPN transistor) because this can cause damage (at least conventional transitor wisdom claims that).

Of course, only a test can give clarification, this is just theoretical waffling.

Greetings, Conrad