Joule Thief

[electricme]

@Jeanna,

OK you guys,
It is my turn to complain.

thank you all,

jeanna

Chuckle

jim

[Pirate88179]

@Jeanna,

Chuckle

jim

Yes, me too.

Bill

[electricme]

@TheNOP,
This is very interresting.

impedence is the resistance to current changes, AC or pulsed.

as you add turns you are changing the impedence.
if the impedence goes higher, the current goes lower, just like with resistors.
lower current mean a smaller mag field, so a smaller collapse.

the game is to match the frequency to the coil(s) you have.

and that a load(s) will change the impedence too.

If I understand this right, if I wind a single secondary coil on a JT, and the more turns I put on the coil, then the higher the voltage will rise, up to a point.

So if the JT battery had a higher current supplied to the Bifilar windings, then there would be even more HV output? Could I switch higher pulses by paralleling the JT transistor?

So, if I wind, say 32 secondaries using, say 12turns each, then each output will be 12v but at a higher milliamp?

I see this with my 4 secondary output toroid.

I wonder what will occur, if I drive 4 extra toroids off each of my outputs?
I will have to remove the bridge diodes though. hmmmm.
I will thionk about this a bit more.

jim

[electricme]

@Bill,
I see the thread is almost to break the 700 pages, it is still going strong.

jim

[electricme]

@All
Over the last two days, I have been making a new Earth Battery which its prime purpose is to power my Joule Thief, so as this is the case, and since this EB is not a Stubblefield one, I will present it here for all those who read this thread.

I thought this cell EB was a something extra that Stubblefield had made, it wasn't, it was  a design by J. W. Wilkins - Bain - and John Haworth.

These are my efforts to make this cell.

0784 = The hole, well it goes in the ground
0873 = Copper sheet with a 10 1/2" diameter dinner plate as the former
0877 = Starting the cut in the copper plate
0880 = Drawing the "disk" onto the thin steel sheet
0882 = Beginning the "cut" in the steel sheet
0884 = Last of the cutting, I didnt knock any bark off
0885 = Both disks, what they look like flat on the ground
0886 = How the composite battery should look like, just the two disks
hmmm  this is the profile