Joule Thief

[stprue]

@gadget

I think that this crt would give Lasersabers low voltage crt a run for its money!

Thanks again for the diagram.

[gadgetmall]

I don't know his said circuit lights a cfl with a cap . I have tried over a year to do that  and not even close . A cap just don't
have that much energy to run said 25 mins+ ?;{} Anyways some one breadboard this one so i know i got it drawn t
right please . The trimmers i got can probably be replaced with a 1 through 7 pf disk . I don't have a cap meter but it has to be one of those capacitances.

Gadget

[stprue]

Are you talking about LS initial ringer crt?  If so I was able to ger it running a cfl for about 5 minutes off of a 1000uf cap.  That was a proto so it has since been dismantled.

[TinselKoala]

Sure, all you need is more capacitance. I've put together a bank of electrolytics that is around 300,000 microFarad and can handle 40 volts safely. Fits in a plastic shoebox, 7 big computer-grade filter caps.
That one will run your ringer-powered CFL for hours, but you have to be careful with that much capacitance, it's easy to do damage to stuff when charging and discharging.

[TinselKoala]

I don't know his said circuit lights a cfl with a cap . I have tried over a year to do that  and not even close . A cap just don't
have that much energy to run said 25 mins+ ?;{} Anyways some one breadboard this one so i know i got it drawn t
right please . The trimmers i got can probably be replaced with a 1 through 7 pf disk . I don't have a cap meter but it has to be one of those capacitances.

Gadget

I just have a question about how the LED is hooked up. Is that part right? The anode isn't connected to the transistor collector at all, but rather to its base?
I think that one might be able to use a "gimmick" for the small trimmer: just two pieces of small, insulated wire twisted together for several turns, then "chopped" to trim. At least that works for trimmers in that range in other circuits. What do you think?
I've got it just about done but I can't find a 200k trimpot in my box.