Joule Thief

[jeanna]

Good that worked. Now for a looong page with cryptic details. If you compare the specs page given above with the shortened details given on this data sheet, you will be better able to use the data sheet.

Here is the datasheet:

http://www.orpheuscomputing.com/technicians/transistor_specs.html

jeanna

[gadgetmall]

Hi xee2,
I haven't found one yet that IMPROVES performance. I have just put in a 102pF at the base resistor that filled in between where the rest took me yesterday. But, still, no matter what I put into the base, there is an amperage hit. (the hit is only 10 mA, ) but I wonder why it is there?

What is it supposed to be doing? Is this another "tank"spot?

thank you,

jeanna

I need to re-find my good source for good cheap leds. I do not consider $1 to be good and cheap. Any leads for leds?

EDIT. I actually have found it, but, hopefully there is an omission in their webpage. The only item missing is the single white led, although there is an actual link to the item.  I emailed them.

With luck we will have a really good source. I paid $19 for 50 bright leds a few years ago. The prices look the same on all the other items. With fingers crossed...

in reference to cheap white leds . at flea markets athey sell a ring light that has 22 bright 1 watt luxor leds on them for 3 bucks . this light takes 4 aa batterys and i converted them over to JT one batts . i took one apart and cut all the little bright led out . each has its own little circuit board to solder leads on   Look and see if you have ever seen these. The  chinese with all the boxes of stuff allways have little flashlight with bunches of leds in them for cheap !!!!

[nievesoliveras]

@all

I do expect that now it will be correct.

Jesus

[jeanna]

Thanks gadgetmall,

I just have a hard time breaking into something that works.

Also, I am thinking ahead to making a joule thief party and showing other people how to do this etc.  There is enough of a barrier to getting folks to make their own (except for experimenters like us) so, I wanted something clean and new for them.

If this company still sells them 35-40 cents each is pretty nice for a matched batch of leds.

Thanks,

jeanna

[electricme]

@ Jeanna,
Those 2 transister charts were a very good find, I just downloaded them.
Well done Jeanna

@ Mk1
What Post or Page is the stuff you want me to take a look at?

@ Gadgetmall,
Very nice sewing on your mobius coil, I sent u a PM

To those wanting to make your own resistance wheel, it is not hard to do, just buy all the different resisters and a multi position switch, a couple of leads and tiny alligator clips.

Same to make a capacitance wheel

But out this way, the best switch has 1 pole 12 position, which limits how many resisters one can use.
An alternative would be to use a CB radio 40 chanel switch, but I have never tried to see if they are 1 position or multi position, anyone know? I will tear one apart this weekend and get back to all lol.


@ Bill
Hows your cat progressing, hope he is getting better now.

BTW, Bill the peanut butter trap got a mousie, must a got him a few days ago, he crawled away into a dark area, I missed him, smelled a pong yesterday, found it this mornin, smell was real bad. Phew, I'm airing the place, fans going full blast, sprayed the dissinfectant lol.

got to think up a way to keep the peanut butter on a trap without the mouse gobbling up all the PB.
Would a sponge do?


hooroo
jim