Joule Thief

[LightRider]

Thanks Jeanna . They were Bright > its a Forum Problem i think . Nice Output but no light ?? Chop a dollar cfl up and it will .  I went back several pages and all the pics are gone and they say An Error Has Occurred!
You do not have permission to approve items.

A little help would be appreciated...
I mess up something...
now, i can't see post image anymore, I just see:

sale.jpg (51.33 KB, 621x398 - viewed 220 times.)

and if i click it i get the error page:

An Error Has Occurred!
You do not have permission to approve items.

Thanks,
LightRider

(Sorry to be off topic)

Same thing here... ?! 

[xee2]

@ hazens1

Great data, thanks. It looks like your transistor is reaching its Vceo breakdown at the upper collector turns. I think you may need a transistor with higher Vceo or a larger base resistor. The collector voltage spike increases with number of collector turns so there is an upper limit to the number of turns at a given base current level.


600 volts for a 100 turn pickup coil seems good to me. It looks like you should not have any problem getting 1000 volts.

[Pirate88179]

Al:

I would like to order that supercap if you have any left.  E-mail me and tell me what I need to do.  Thanks.

$10.00 for a stun gun?  Wow!  That is a deal!  I'm shocked! (sorry)

Bill

[Artic_Knight]

here is the results of my tests and the successes.

i lit the led at a guesstimated full brightness with 1-120kh variable in parallel with a 2200uf cap however the negative was on base, this created a blinking effect which the frequency was controlable by the resistance. i switched the cap to a 10uf cap and the blinking effect was eliminated however now the resistance was controling the brightness and the cap was positive to base. i attatched the 2200uf cap in parellel with the battery to get a 2mah reduction in draw and was able to reduce the total mah draw to 2.5 while maintaining a guesstimated half brightness on the led.  essentially i followed the following diagram however the resistor to base was variable the pos terminal of the base cap was facing base at 10uf and the cap in parallel with battery was 2200uf.  the turns on the torriod was not counted however its guesstimated at 14 turns primary and possibly 60 secondary. the secondary was connected to the collector and the primary to base. the values of the led and ferrite are unknown and salvaged.

i believe the mah can be maintained while increasing the freq and brightness of the led. this will be tested later.

[xee2]

@ Artic_Knight

Thanks for the test data. I am looking forward to seeing your images when the server gets straightened out and will show images again.