Joule Thief

[crowclaw]

Hi Bill, give it a try... the only thoughts I have is the Vce of the 2N3055 we know it's a robust beast at 15amps but has a 50v limit. How about looking at line scan output devices from early TV scaning circuits, these are designed for very fast switching and high collector pulse voltages. Some of these devices will have an integral diode of course which may or may not influence their performance with JT circuits. I'm sure you can pick up scrap TV's for nothing and salvage these devices, worth  looking into.

[Pirate88179]

Thanks for the reply.  I am using the TIP 3055 that lists the Vce at 60. (collector base is 100 volts)  I don't know if I will exceed that or not but, I have a bunch more of them so....why not?

I will look into your idea.  Here at my apartment complex, someone throws out an old TV about once/month....or crt computer monitor.  I have salvage many cool things from the dumpster, ha ha.  I would have to figure out how to wire it up though.

Thanks again,

Bill

[Pirate88179]

https://www.bgmicro.com/PWR1161.aspx

A fellow left a comment about where to obtain large toroids and at that site I found the above.  (see link)  This is a ferrite 3" OD x 1" thick toroid already wound with magnet wire and a primary.  I ordered 4 of them and will see if I can hack these to make more lights.  I will probably have to re-do the primary and add a pick-up coil but, hopefully I can keep the secondary windings as they are.  If not, I get a cheap ferrite toroid and some spare wire.

Bill

[turbogt16v]

hello

is this schematic possible to be charged by 12 v from my PC

http://www.overunity.com/6123/jule-thief/dlattach/attach/123805/image//

and to able to lift the power and how much ?

I am asking because i want to charge up a bit my speakers with this free electricity, and i need to know how powerful amp do i need ...

[Pirate88179]

Hello, and welcome to the topic.

That JT in that schematic will produce close to 1,000 volts from a "dead" 1.5 volt battery.  I have run them at about 2.5-3 volts but not 12 as the input.  The output is high frequency high voltage and I don't think that is what you are looking for as your speakers are most likely dc.

Also, remember that this energy is only "free" because you can use batteries that others have thrown away, or, like me, my friends save a bunch of them and give them to me so my lights around my home are free.  This does not produce more energy output than is put into it.

I hope I have answered your question ok.

Bill