Joule Thief

[xee2]

@ kooler

I finally got my SCRs. After burning out several parts, I was able to make a circuit that triggers the SCR. The circuit flashes the neon about once per second. Not very impressive, but after having so much trouble getting the SCR to trigger it seems like a big victory. Now I will try to increase the output voltage. Have you tried anything else?

[kooler]

@ xee2

i have not had any luck firing the scr with a resistor in line with a diac or neon ...
it has been locking down my scr
but this schematic here seem to do alright
with firing a car coil and a flyback coil.. i been running it thur a toroid of 3 1/4''
with a 1:1 ratio it will light small bulbs.. but i need more hz's to get the unmodded cfl to light
it just blinks fast and bright.. the schematic below i am using 0.33, 0.2, 0.1, 0.047 uf caps
i'm about to give up..hahaha

[ian middleton]

G'Day all in joule thief land.

@jeanna,  well after all this time you finally got me to come over and have a look.
Nice you-tube videos by the way, well explained. Can I use your voice on my answering machine?
Anyway using one of your earlier diagrams I built a JT today and it works just jim dandy.
Does that make me part of the "in" crowd now? 

I also knocked up a beefy crystal battery which is showing alot of promise. now to bolt the battery to the JT and see what we get.

I'm of to make another JT, there are  so coooool. 

Catch you later guys.

Ian

[resonanceman]

  Each plate of the capacitor is a scource or drain depending on the last pulse from the inductor.

This looks to  me like  a thought  worth a little  experimenting




gary

[xee2]

@ kooler

but i need more hz's

I suspect that the neon bulbs are slowing you down. I have never been able to get them to turn on and off fast. That is why I am using zener diode.