Is joule thief circuit gets overunity?

[TinselKoala]

Instead of using a toroid, wrap your coils around the run battery itself, in layers, with the greater number of turns "secondary" wound first, then the lesser turns "primary" wound over the outside of that. You may need a few more turns than "standard". If you have a little tube that the battery will slip nicely into, use that for the coil form, so it's easy to change batteries. Compare alkaline, NiMH, and carbon-zinc batteries. Also do the same with a supercap: use it as the coil core.

[ltseung888]

I intend to conduct more experiments with Lawrence's boards first, but sure, it might prove interesting to investigate and try different core materials to see how it impacts circuit performance.

@Void,

Thank you for your efforts.  Please do one waveform and DSO analysis using my "4 CH scope" connection.  It will remove any unnecessary disputes with our comparison experiments in different parts of the World.  Try to do the experiment in a normal environment and then in an "electrosmog" environment.

Once you have done that, do the following:
(1) Connect one capacitor in parallel with the DC Power Supply.  You can hook the capacitor positive to Vin and the capacitor negative to Vout. 
(2) Set the DC Power Supply to 1.5V and turn it on for 1 minute.
(3) Turn off the DC Power Supply and check how long the LED will be ON.  Check whether the brightness appears to be the same in the first 2 minutes.  You can be more scientific and use suitable instruments.  I just use the naked eye.
(4) Repeat the above with 2, 3 and 4 capacitors in parallel.  I believe you have 4 of my capacitors.
(5) Repeat that with your super capacitor.
(6) The above will prepare us for the next experiment.  We shall use a timer to prolong the battery life (or cut electricity bills).  One group claimed to have used such techniques plus small solar panels to achieve the "forever lighted lamp".  Their electricity bill was greatly reduced.

Mr. T S Lau is repeating the timer experiment with a single capacitor.  My unconfirmed information is that different value of the capacitor and/or timing will give different battery lives (or pay different electricity bills).  I shall take apart that Rex Dual Timer after his experiment.

[Pirate88179]

may i see your video. post the link

http://www.youtube.com/watch?v=agqKEed7AOI  (400 LEDs from JT and EB)

http://www.youtube.com/watch?v=5kL8ys8m0-4  (EB and JT run 48" tube)

http://www.youtube.com/watch?v=rauOlhNK0iY (EB and supercap run Bedini motor)

Check out my channel for other similar videos.

Thanks,

Bill

[Void]

Instead of using a toroid, wrap your coils around the run battery itself, in layers, with the greater number of turns "secondary" wound first, then the lesser turns "primary" wound over the outside of that. You may need a few more turns than "standard". If you have a little tube that the battery will slip nicely into, use that for the coil form, so it's easy to change batteries. Compare alkaline, NiMH, and carbon-zinc batteries. Also do the same with a supercap: use it as the coil core.

That's an interesting idea. The coil windings will probably induce eddy currents in the metal casing of the batteries, which will probably reduce the self inductance of the windings, but it will be interesting to see what results this produces. Also, winding around the super cap should be interesting as well. Good idea! I will give this a try when I get a chance.

[Void]

@Void,
Thank you for your efforts.  Please do one waveform and DSO analysis using my "4 CH scope" connection.  It will remove any unnecessary disputes with our comparison experiments in different parts of the World.  Try to do the experiment in a normal environment and then in an "electrosmog" environment.

Once you have done that, do the following:
(1) Connect one capacitor in parallel with the DC Power Supply.  You can hook the capacitor positive to Vin and the capacitor negative to Vout. 
(2) Set the DC Power Supply to 1.5V and turn it on for 1 minute.
(3) Turn off the DC Power Supply and check how long the LED will be ON.  Check whether the brightness appears to be the same in the first 2 minutes.  You can be more scientific and use suitable instruments.  I just use the naked eye.
(4) Repeat the above with 2, 3 and 4 capacitors in parallel.  I believe you have 4 of my capacitors.
(5) Repeat that with your super capacitor.
(6) The above will prepare us for the next experiment.  We shall use a timer to prolong the battery life (or cut electricity bills).  One group claimed to have used such techniques plus small solar panels to achieve the "forever lighted lamp".  Their electricity bill was greatly reduced.

Mr. T S Lau is repeating the timer experiment with a single capacitor.  My unconfirmed information is that different value of the capacitor and/or timing will give different battery lives (or pay different electricity bills).  I shall take apart that Rex Dual Timer after his experiment.

Ok, as soon as I get a chance, I will do power measurements for some of your boards with the scope probes connected in the way you do it, to make it easier for you to compare to your own results. Yes, you sent me four of your 10F super capacitors.

In (1) above, I assume you mean to connect the super cap negative terminal to the Iin terminal on your boards?
In (3) above, I can measure the output power at the start and compare to the output power after two minutes. If the output power is close to the same, then that would mean that the LED brightness should be about the same. It is doubtful that one could accurately judge small differences in LED brightness just by eye. I know I certainly couldn't anyway.
I may well have to wait till at least the weekend to conduct these tests for you.