Joule Thief

[innovation_station]

thank you gadget that may well be the case ...

@xeeee   nice work im half done building 1 like it ...  but i found  some really fine coated wire    laying around ...  i forgot i bought it

primary is wound ... now   i did 30 turns im on the secondary ..  it will be 120 turns..  same gage looks like 30 or 32 gage wire ..

i will post when i get it working ..

ist

[xee2]

@ ist

I think 10 and 120 turns will work even better. I am using 21 ma from battery. With 120 turns I suspect that the base resistor can be increased to 2K to 5K and the neon will light with less current from battery. Please post your results.

[innovation_station]

i will post and i can always unwind some off the primary ...  if you think this is best i will do so ...

10 primary 120 turn secondary  {really  just the other half of the jt winding ...}  and i do want to wind a secondary over the ring but is there any spical way or place to wind a secondary ..?

ist

i ran out of room on that unit ....   


im gonna cut apart the cosmic rose jt and use that core it is bigger

so all will fit ..  also im gonna just wind the first part of it bifillar till i get my 10 turns then carry on from there

[xenomorphlabs]

@ all: I am trying to wind a secondary coil onto a ferrite toroid core as a pickup (8 windings, tried also 100)
My primary is bifilar wound like the normal joule thief (8 windings).
The joule thief circuit also DOES light up an LED,
but i get absolutely NO VOLTAGE on the secondary. I am using a core salvaged from a PC power supply. I tried a green and a yellow one.
I really have no idea why this would not work.Maybe these cores are no good, so no magnetism reaches the secondary?
Anyone has an idea what is wrong?
Thanks

[innovation_station]

@ all: I am trying to wind a secondary coil onto a ferrite toroid core as a pickup (8 windings, tried also 100)
My primary is bifilar wound like the normal joule thief (8 windings).
The joule thief circuit also DOES light up an LED,
but i get absolutely NO VOLTAGE on the secondary. I am using a core salvaged from a PC power supply. I tried a green and a yellow one.
I really have no idea why this would not work.Maybe these cores are no good, so no magnetism reaches the secondary?
Anyone has an idea what is wrong?
Thanks

as i have seen you get 1 or the other

my idea is this use the tranny as we are but send that through the secondary   im gonna try that at some point ..

ist