Second Stage Joule Thief Circuits

[Groundloop]

@broli,

I see what you mean. It was my goal to use as few parts as possible
to keep the circuit KISS. If you want to stop the JT from charging
when the super caps is full then just add a NPN transistor at the base
of the 2N2222. The NPN transistor can be biased from the super cap
voltage so that the 2N2222 base will be brought to ground when the
super cap reach 2,6 Volt. This will stop the JT oscillation.

Alex.

[broli]

@broli,

I see what you mean. It was my goal to use as few parts as possible
to keep the circuit KISS. If you want to stop the JT from charging
when the super caps is full then just add a NPN transistor at the base
of the 2N2222. The NPN transistor can be biased from the super cap
voltage so that the 2N2222 base will be brought to ground when the
super cap reach 2,6 Volt. This will stop the JT oscillation.

Alex.

I understand but imagine you leave this on overnight for benchmarking and something happens with the load or connection (like gadget's cat  ), now the bcap will keep charging past its 2.6 limit and potentially explode or cause a fire.

[guruji]

We're going to fly with this JT guys  look at this video it's a toroid invention too to antigravity:
http://www.youtube.com/watch?v=dSHD9rJWHiE
Enjoy.

[Groundloop]

@broli,

If you have some good ideas on how to prevent that, just post them and I will update
the circuit.

Alex.

[broli]

I'm embarrassed to say that my electronic knowledge is very basic so I can't recommend or make specific changes.