Joule Thief

[jadaro2600]

Well, for the most part, I've been using a core without ferrite - I've wound a coil using 26 gage wire and then wound that toroidal coil with 30 gage wire.  This blocking oscillator is what I use in the jtc.

Can someone please explain how to measure the usage of current in the jtc? ..where should i measure current draw?

[xee2]

@ jadaro2600

The ampmeter goes in series with the battery as in following. Transistor was actually 2N3739 (it is wrong in diagram) but any transistor should work. Battery current can be adjusted by varying the base resistor value.

[electricme]

@Ist,
Hmmm 2 photos at the top of post 313.

OK there are 2 identical shake torch pcbs and contents thereof. 
Without reading the posts further down, I think you are charging the Hi V Caps in parallel using the JT to do it.

I must get a couple of 3v X 3watt hi brightness LED torches to play with soon.

General Jim

[innovation_station]

@Ist,
Hmmm 2 photos at the top of post 313.

OK there are 2 identical shake torch pcbs and contents thereof. 
Without reading the posts further down, I think you are charging the Hi V Caps in parallel using the JT to do it.

I must get a couple of 3v X 3watt hi brightness LED torches to play with soon.

General Jim

there batteries in the NOMA shake it flashlight ...i wish they were BIG SUPERCAPS..... they have 2 coils in the flash light ...   so there is 2 rectifiers in them going to 1 battery ...

then there is 2 discharge settings 1 led wich will be OUTPUT  and 3 leds = 1 OUT PUT AND 2 FEEDBACKS    1 push of the button  or 2 

lol

i can say i quit counting the discharge time .....    there is still light there .......   hummmmmmmmm




ist!

[electricme]

@ Ist,
further hmmmmm

I have a hand wind generator flashlight, 1 button turn on unit.
Press button once = 1 LED lights
Press Button again LED off
Press button again = 3 LEDs on
Press button again  all LEDs off.

So Ist, you can select the "charge rate"? Lo or Hi?

@ hazens1,
Nice photo of your 1st working JT replication, well done,
and welcome to the group sir.
BTW don't know if the others picked this up, but thats a nice looking big 10mm LED 

ps the "others" are so involved they forgot their welcome manners he he he.

General Jim

@all
Q whats total frustration?
A Packing 2 torids to wind this weekend and forget to pack the wire, grrrrr