AC from Joule Thief Secondary/pick-up

[nievesoliveras]

But it is.
The Emitter is connected to the neg of the battery.
I doubt if I will EVER forget that one! 

Jesus, He didn't say the base did he? I think he said Emitter???

jeanna

Thank you @jeanna !

You are right he said emitter.

There is no direct connection drawn from the battery to the emitter of the transistor on the schematic because the connection is made using a ground symbol on the battery negative pole and another ground symbol at the transistor's emitter.
The person reading the schematic must assume that both are connected together.
The connection is drawn symbolically.

Jesus

[jeanna]

OK test 1a and 1b didn't help, or didn't do anything except turn off the leds and stop the action in the previous parallel circuit. more work to do there, maybe.

Now, I will put a bifilar joule thief and maybe one with a secondary onto those main parallel leads.

This is basically to replicate the 2 tier, but in this more understandable circuit.

jeanna

[nueview]

hi All
just a question for possible thought why not build a double JT around a center tap transformer if the batteries are on the center tap leg and paired transistors are at the ends of the center tap coils and you take the signal from the secondary side to drive the pair of transistors in opposite directions the power should be better and the output more ac in quality having spikes both pos and neg of course the output may be something to look out for it may solve some of your power problems.
Martin

[Mk1]

hi All
just a question for possible thought why not build a double JT around a center tap transformer if the batteries are on the center tap leg and paired transistors are at the ends of the center tap coils and you take the signal from the secondary side to drive the pair of transistors in opposite directions the power should be better and the output more ac in quality having spikes both pos and neg of course the output may be something to look out for it may solve some of your power problems.
Martin

Well you can definitively do that , because that is what is done right now ...

But regular transformer are made for 60hz function , that is in my view a limiting factor , but it can also be use in a second core application to get the high freq down to 60hz...

Mark

[nueview]

@ MK1

i think you need to build one before predicting the out put will be glad to post a picture of mine any add on circuits go between the  secondery coil end opposite the transister drive hookup and ground . mine runs on 12 volt but could be more or less components make the difference.
the goal was stated as getting to higher power if i got what Jeanna was saying in the post.
Martin