Second Stage Joule Thief Circuits

[tysb3]

I'm not very optimistic about this too. In video comments appeared comment that it doesn't work

[Void]

I'm not very optimistic about this too. In video comments appeared comment that it doesn't work

Hi tysb3. Yeah. Really there is no reason that I can see to think that it would work,
unless you have a strong radio transmitter nearby beaming a radio signal towards
the circuit. For a circuit to be self running, it has to get its extra energy from somewhere.
That circuit is just a modified multivibrator circuit, so I can't see any obvious reason why it might self run,
unless maybe the toroid he used is radioactive.   

The guy who breadboarded that circuit you posted the picture for and who said he could not get the circuit to self run,
interpreted the '10H' capacitor as 10nF (capacitor marking in the picture is 103).

P.S. In the second video, he measures the diode current as a round 300 uA I believe.
The total power dissipated by the LED in his circuit is maybe around 300uW to 500uW.
I think it will not take all that strong of a radio signal to produce that small amount of power,
similar in some ways to a crystal radio. Some people suggested he place his circuit inside a microwave
oven to act as a faraday shield, but so far he didn't try it. I think his LED should go off
if he tries that. If not, then his circuit is magic.

[tysb3]

yes, some commentators and I ask him to place his circuit inside a microwave but no reaction from him.

[tysb3]

another video with new experiments. circuit placed inside a microwave

https://www.youtube.com/watch?v=wi1A4QFSRKw

[AlienGrey]

Come on lads, this is a time waster, it doesn't stick to any of the rules, it's just a basic multivibrator with a hidden battery. I mean It doesn't produce any HV spikes. just a scope shot showing a square wave. he is having a laugh!