Joule Thief

[xee2]

@ jadaro2600

You might want to try adding another coil coupled to the collector coil like this in order to get a higher output voltage. I think it takes about 300 volts to turn on a fluorescent tube (and I think that voltage drops once it is on). But I do not have a scope so I can not measure this.

EDIT: If properly connected the voltages generated by the two coils should add (so you should be able to inrease your output voltage). How much will depend on coupling between coils.

EDIT 2: corrected circuit drawing.

[jeanna]

@jeanna,

Thankyou, I've made several normal joule thief circuits with regular ferrite toroids. And now...Perhaps I'll make something different yet again.  I'm waiting on parts to come in the mail, but they're not going to help me with this new setup I've got.  I may be able to make something from this new one with regard to your three axis dream ... if I place these inductors just right in the setup below.  I was thinking about a spherical trisection with three inductors.

edits, voltage reading was wrong.  additional info was added as well.

I got up early to edit an omission from my post from last night. So, before I go back for an early morning re-awakening...  I will reply to this.

I am not sure what you are saying about your regular jt circuit. You complained yesterday that you are not getting anything from the secondary.
It is from that plain jtc that we are all getting the extra energy off the secondary at little to no additional cost from the battery. If you have made several of these, are you able to get the energy off the secondary of them?

thanks for your innovations,

back to sleep for a while,

jeanna

[jadaro2600]

I got up early to edit an omission from my post from last night. So, before I go back for an early morning re-awakening...  I will reply to this.

I am not sure what you are saying about your regular jt circuit. You complained yesterday that you are not getting anything from the secondary.
It is from that plain jtc that we are all getting the extra energy off the secondary at little to no additional cost from the battery. If you have made several of these, are you able to get the energy off the secondary of them?

I haven't been able to get anything off of my pickup coils that I've added to my custom copper toroids - not anything significant.  But, from the regular jtc's I get plenty - as well as from this most recent thingy I've made, it seems as If I'm getting a lot from that too.  I'll have to add another coil to it to see what happens.

@xee2,

Thankyou, I was thinking of doing something along those lines - the circuit diagram help.  I added one to a recent post a page back.  All of my components have changed from the pictures.  I don't think that I have a transistor that can handle anything over 75 volts.

@all,  Since the juice is flowing through the led's or what have you, wouldn't it be safe to say that ther's not to much danger to the transistor? ...wouldn't the extra components just sink the current and voltage? ...this is not in reference to setups with pickup coils.

[dog812]

I have been following this thread for awhile.. i finally went out and bought the parts needed to make a regular JT tonight..

I will it give it a go tonight after work.

I was wondering..Which wire is better to use? i have all different sizes.. 22 ga - 30 ga.

And i have been trying to figure out what you all mean by secondary? I can t find the original deffinition of it in here.
Is it like a whole other coil you add to the circuit?

[xee2]

@ jadaro2600

If you put an LED between the collector and emitter it will limit the spike voltage so you will not be able to get a high output voltage. A neon between collector and emitter will limit spike voltage to about 100.