Joule Thief

[xee2]

@ kooler

I do not have any experience with SCR circuits. Do you think a resistive divider like this might work?

[kooler]

@ xee2
i not sure.. i do know that the scr have very sensitive gate
0.5-1.5-5.0 volts
so maybe if you got enough resistance it might work???

you can get some 400-600 scr with a t0-92 pretty cheap
like .49 cents each

edit....
what i was saying about the gate is it will probably trigger it all the time and burn the scr up
i was thinking of trying a 200 volt diode backwards to trigger it
since you can trigger it with pos or neg

[xee2]

@ kooler

I have ordered some SCRs similar to yours (MCR106-D) but they will not get here until late next week. I have been trying to learn a bit about SCR circuits. I have some 90 volt gas discharge tubes (basically just a neon bulb that fires at a specific voltage) that I think I can use as a high voltage zener diode in the following circuit. I think that is what I will try first. Thanks for your help.

[guruji]

Hi guys today I turned more turns to the primary double JT toroid coil and acquired more voltage.
So is it better to turn more than 20turns as said to a toroid JT?
Can I use a transformer instead of losing time winding the toroid?
Any help please?
Thanks

[innovation_station]

i love it!!

great curcuit! 

scrs look kool im sure i have a few somewhere ... 

looks like a diode gatekeeper with a trigger

ill build this thing too some time ..... 

honestly i cant keep up with all the things i already need to finish ..

but im not worried it will come togather all at ONCE... 

ist!

still doing lab construction .....   but it is getting there ...