Joule Thief

[nievesoliveras]

@nievesoliveras

Thank you Jesus.

Mark

Thanks jesus,

I am afraid I don't get anything from that. I get 0.5vdc but there is no voltage AC.

But this  is to common (red?), ground (black?) shows nothing.

but, I think it is a good joule thief, don't you?

@jesus, can you tell me how to tell which is the collector, base, emitter when it is not marked?

I got these to work by flipping the transistors around. Now I am not sure.

thank you,

jeanna

@jeanna

The base is where the resistor is connected , and the emiteur is the the one going to the neg(-) of the battery.

@ Jeanna:

Jesus posted this twice on here but, I did not want to go back and find out where it was, so, I uploaded a copy I made from when he helped me.  (I hope it is readable)  I needed this when making my first JT and Jesus responded with this picture.

PS My transistors were the @N type (American)

Bill

@all

This is a real good team!
It seems there is a big difference from the time on my country and the time on your country. You are ahead 4hrs.

Jesus

[timmy1729]

@MK1

I tried your pickup coil idea and here is what I got:
I used a 4-pin bridge from an old PC power supply, a 1.125" toroid, 18 turns of 18-gauge solid copper wire, 4 turns of 20-gauge(I'm guessing, it's barely smaller than the copper) stranded iron(?) wire as my second coil, a high-brightness pink LED(3.5v) on the JT, a regular plain red LED for the pickup, and 13 turns of magnet wire 30-gauge(guess) as the pickup coil.

I first made the JT function properly. I got 3.1vdc at 109mA. Then I wound the pickup coil and hooked it to the inputs of the bridge. I placed the red LED on the + and - of the bridge and hooked up the battery. Same readings for the main JT. The pickup coil was giving me anywhere from 0.025vdc to 0.75vdc at 3.2mA. The red LED lit but it was not bright and the LED on the JT stayed bright.

@ALL
I wondered if it would be possible to channel that tiny bit of current to charge a cap which would then do something useful. Exactly what, I don't know.

Also, which has had better results for winding toroids; a ton of turns of tiny wire or fewer turns of a bigger wire? I have lost 0.2vdc with this current setup since I rewound the toroid. Earlier I had bifilar winding of 20 or 22 gauge stranded copper. I am wondering if I would get more current out of my pickup coil using that again for my main bifilar windings.

[Mk1]

@ Timmy

You have been busy, good!

Ok , first if you use a iron or any type of materiel for the coil , it needs to be insulated to not create a short when turns touch .

Second , always check the ac and dc volts of the pickup coil, make sure that the joule thief is connected ok , i stress this because the led working is not a 100% way to say you built it right, always check what happens with the led connected both ways .

I have built jt circuit that works the led but still not properly connected.

Keep the good work,you are about to see amazing things !

[Pirate88179]

@ All:

I just received a suggestion from my friend Hans Vonlieven, whom I suspect many of you know.  His idea is kind of similar to what Jesus has been working on, with a twist.  Hans suggested using a decent (but inexpensive) solar cell to replace our AA battery in the circuit.  Many of these are available form places like electronics goldmine for under $5.00.  Then, using our superultrabright leds, (like my 2 265,000 MCD units) we feed back into the solar cell this high intensity light output.  It may not be enough to run itself, although, if done right, I suspect it might be close, but think of the increase in duration we might get?  I am not even thinking of trying this outside.  I am already thinking about "jump starting" the circuit with an AA battery and then, somehow, switch over to the LEDs/solar cell for the main input power.  This could easily be done by using one or more supercaps.  (I knew these would come in handy)

So, we fire this thing up, and shine the LEDs directly into the solar cell.....and see what happens.  This thing might run for weeks and weeks....who knows?  I think what makes this all very possible is the advent of the very high output LEDs and the new supercaps.

I will try this as soon as I can get some cells delivered here.

Thanks Hans!

Wait, I can almost hear Jesus thinking........hey what if we did this AND hooked this up to a Bedini motor????????
The possibilities are endless my friends.  I don't believe in OU so I don't think it will do that but, it may actually be able to close the loop and "self run".  Maybe???????

Bill

[timmy1729]

@ All:

I just received a suggestion from my friend Hans Vonlieven, whom I suspect many of you know.  His idea is kind of similar to what Jesus has been working on, with a twist.  Hans suggested using a decent (but inexpensive) solar cell to replace our AA battery in the circuit.  Many of these are available form places like electronics goldmine for under $5.00.  Then, using our superultrabright leds, (like my 2 265,000 MCD units) we feed back into the solar cell this high intensity light output.  It may not be enough to run itself, although, if done right, I suspect it might be close, but think of the increase in duration we might get?  I am not even thinking of trying this outside.  I am already thinking about "jump starting" the circuit with an AA battery and then, somehow, switch over to the LEDs/solar cell for the main input power.  This could easily be done by using one or more supercaps.  (I knew these would come in handy)

So, we fire this thing up, and shine the LEDs directly into the solar cell.....and see what happens.  This thing might run for weeks and weeks....who knows?  I think what makes this all very possible is the advent of the very high output LEDs and the new supercaps.

I will try this as soon as I can get some cells delivered here.

Thanks Hans!

Wait, I can almost hear Jesus thinking........hey what if we did this AND hooked this up to a Bedini motor??
The possibilities are endless my friends.  I don't believe in OU so I don't think it will do that but, it may actually be able to close the loop and "self run".  Maybe?

Bill

I like that idea!