Joule Thief

[xee2]

@nievesoliveras

Wow, you are quick. I am not sure I understand all that you did. The Radio Shack transformer was not a substitute for the camera transformer. It take the place of part of the camera transformer. The other part of the camera transformer needs to be made but is a simple standard Jule thief transformer that can be made from twisted pair of wires and toroid. You did get the transformer I was thinking of. Since you are building it, I looked it up and modified my circuit to show the correct lead connections.

[nievesoliveras]

@xee2

I will try it tomorrow.

Jesus

[Mk1]

So this is what i got, it runs from the cap for about 2 minutes . And lights 2 leds.

[nievesoliveras]

@mk1

There was a mistake on the circuit. You said that one transistor is NPN and the other PNP and you drawed them both NPN.
Should it look like this? Or you have the PNP on the other side?
Also, where is the bridge rectifier connected?
Another thing, is the cap electrolitic or ceramic?
Last, where the LEDs are connected?

Jesus

[Mk1]

Thanks , sorry for mistake.I made it with paint i don' t have the appropriate software The cap is electrolytic, and the only output is from one additional coil added and not connected to anything except the bridge rectifier , so the circuit is to provide pulse and the power is then pickup by induction. Like in this schematic