Joule Thief

[electricme]

@Resonanceman,

It looks like  MOTs are hard on  transistors

I have  blown 2 3055s in  2 days .

The  first one  to go  took me a while to figure it out .

Radio Shack  had a couple  5.1 V zeners   I hope that they are  big enough .....only 49mA
Anyone know  if they can be  used in parrallel ?

Who was it that was wondering  about  lighting  8ft floros ?
I got one

Once I  get  running again I will give it a try

gary

Gary,
Try looking for a transistor that goes in a TV which controls the HV flyback voltage.
They are designed for this stuff.
You can usually find them screwed to the vertical heatsink close the the HV coil.

jim

[xee2]

@ jeanna

Without the 200 uF battery capacitor and using 1000 pF instead of 60 pF after diode increases output voltage to 239 volts. Battery capacitor will add about 10 volts to output.

[jeanna]

@ Jeanna,
I discovered my 2 diodes on the Hazens1 JT had fried, so after I finish my new work desk, I will get stuck into it, and replace them with 1N4007 or 1N5408 (3amp device at 1000Kv).

jim

My fluoro tube is lit without any diodes.

Just put the secondary leads on either side of the tube and it will light up.
(I guess you have seen I need to "hold its hand" a little -literally wrap my hand to warm the lamp first,  and use the magnet on one of the leads to switch it on, but once on the magnet can come off, and she lights up.)

I do think the 25uF at the battery is helping it to stay on, but I am not really sure. I have not played with it after it is on because I am timing it.

So, just put it on with out the diodes and read... 

jeanna

[electricme]

@Jesus,

@all

Everybody is having fun here with his or her project. I am having fun with mine.
It has been lighting an led and recharging the battery for 9 hours now.

I tried and am running now without stopping the circuit to make the change, a Super brigth led mini tap light.
The light is dim and the battery dropped to 1.08v but is still charging while lighting this led trio.

I hope it hold the whole night and I will try to charge another damaged battery and see if this one I am using, holds the charge and how long.

Jesus

That is really good Jesus, well done.

jim

[jeanna]

@ jeanna

Without the 200 uF battery capacitor and using 1000 pF instead of 60 pF after diode increases output voltage to 239 volts. Battery capacitor will add about 10 volts to output.

xee,
Do you have any idea why mine had more frequent and higher spikes with the diode and the cap both removed?

I think you must have those elements because of how you test for voltage, so I guess you can't just try it to find out. Is that true? Too bad if it is.

jeanna