JT first attempt

[lygeas]

Greetings to all members

I am a newbie to this forum and a newbie to the area of circuits. Recently I came across to the book of P. Kelly "a practical guide to free energy devices" and I was very excited so I decided to begin to experiment first with the joule thief circuit.

I have already created such a circuit that contains
-a resistance of 1k
- a 2n3906 transistor
- a torroid by ring of ferrite with a bifillar cable of 16 turns
- a led Forward Voltage: 1.9 - 2.1 V
- an input of AA 1.5 battery

The circuit operates properly and the led lights as it should. Furthermore when I connect a second led in series, the LEDs continue to light.

Is that an evidence that I have created a JT circuit and I light the LEDs with only a 1.5 AA battery?

If yes then why when I try to measure the output voltage using a 10 code capacitor (0.01nf) the voltmeter shows only 0.3v? (When the input is 1.22v)

What I am doing wrong?

Thank you for you replies

[lygeas]

Greetings to all member

......

What I am doing wrong?

Thank you for you replies

Searching in the net I found that using a diode in series with the capacitor is the proper way to measure the output volts..
Hence, now with the addition of the diode I can confirm the overunity...so I believe that I am on the right direction..

[TinselKoala]

Congratulations on your first JT circuit!

Voltage is not energy, though, and a voltage increase does not mean "overunity" at all. Energy is the important quantity to measure, and power is energy/time (Watts = Joules per second). The JT works by taking the small, constant DC power supplied by the battery, and chopping it up into very short pulses at higher voltage and higher instantaneous power. Your eye "integrates" these pulses so that the LEDs look like they are on constantly... but they are really flashing very rapidly, and in a good JT the LEDs are actually _off_ for most of the time.

The reason your first capacitor didn't charge up is because the energy leaks back out during the "off" parts of the JT cycle. Adding a series diode prevents this reverse leakage and the cap then will eventually charge up to the maximum voltage that your JT can produce. Again... voltage is not energy and mere voltage amplification doesn't mean OU.

Please keep on experimenting, you may stumble on something that other JT builders haven't found yet. And the JT can be very useful in a practical sense. Some people here are even using them for lighting around their homes! I use one as a flashlight myself.

[lygeas]

Thank you Tinselkoala for your answer.

The next step is to use a bigger toroid ferrite core in order to measure the effects. I will keep experimenting and if I will get to something I let you know. I am also interested in the joule ringer circuit.

Again thank you for your answer.

[d3x0r]

a lot of notes on experiments I did with different winding ratios...

http://www.overunity.com/11986/what-i-learned-in-joule-theif-101/#.UokacMS23zE


The size of your core will affect your frequency, but the output per turn will remain about the same.
It takes a longer time to build up a field in the toroid, and then inducing directly into the other winding, which causes the transistor to close, and all the magnetic flux in the toroid to stop having a current supporting it, so it falls out into the windings. 


that's how I interpret it anyway.