Joule Thief

[altrez]

@gadgetmall

Hello! I did try winding it different ways and it made no difference.

@Mk1

I now have 5 working JT circuits and not one of them will work with a pick up coil I have tried 1 turn and I just tired 12 turns and nothing works. The only thing I have connected to the pick up coil is the LED and I have switched that back and forth. I even made what I call a floating loop coil where I can move the coil around on the toroid to find a sweet spot. It never worked!

So I have tried it now 25 different ways with 5 different types of wire. It must be my toroid s I got them from radio shack   the JT's work and will light 30 LEDS from 1 AA battery!!!!!!!! However I can not get any configuration of a pick up coil to even flicker 1 led. I will take pictures tomorrow night and post them I must be doing something very wrong!

Thanks for all the help!

[Mk1]

@Mk1

You recently posted a toroid design where the coils crossed the toroid; did this work?

It did what i needed it to do , at first i tried 3x3 so 6 per side, then 2x2 4 per side, my goal was to get it working in range for my toroid with larger base resistor , and yes it worked. And it bogs me a bit, those will need to be added after the pickup coil , and that i am not used to .

So i guess i hate that it worked making my job a bit harder.

Mark

[Mk1]

@Altrez

Ok so you did try to connect the led in both way, try changing the battery polarety , so neg to positive , and test the led again .

[gadgetmall]

@gadgetmall

Hello! I did try winding it different ways and it made no difference.

@Mk1

I now have 5 working JT circuits and not one of them will work with a pick up coil I have tried 1 turn and I just tired 12 turns and nothing works. The only thing I have connected to the pick up coil is the LED and I have switched that back and forth. I even made what I call a floating loop coil where I can move the coil around on the toroid to find a sweet spot. It never worked!

So I have tried it now 25 different ways with 5 different types of wire. It must be my toroid s I got them from radio shack   the JT's work and will light 30 LEDS from 1 AA battery!!!!!!!! However I can not get any configuration of a pick up coil to even flicker 1 led. I will take pictures tomorrow night and post them I must be doing something very wrong!

Thanks for all the help!

Hi . As a last resort put a diode on your secondary and get the voltage reading .. try to light it that way ok .?

edit**** but you must disconnect the normal collector em miter  leds first ... i got a few rs ones and they work fine . one note here is i have several leds that wont light on a jt either but they will light up on 3 volts dc .. I havent figuared that one out yet . only thing is they must take too much current to light ..

Gadget


@ IST

Where are you Boy  ? Did you Fly away with you know who  ? "E"

[electricme]

@ Gadget
Welcome back man, ohhhhh we thought you was going to die for sure, I can tell you are OK now, you giving cheek ha ha.
Seriously Al, we were all very very concerned for you and your little girl, good thing she jogged your memory about the forum, she gets a BIG GOLD STAR for doing that in my book. You owe her a double icecream in the summer time, lol.

@scienceman,
Ha ha, you and your dad are gonna have a lot of study to do he he, but it is a joy to study up on something you like doing.
Did you see those web sites posted, heeps of em, now I betta go and take a looksee too or you will begin to know more than this old fella.

@MK1
Did I read this right Mark, you got sparks out of a Joule Thief, you not imagining this? because sparks mean GRUNT, AMPS.
And this means we are very very close to getting 1.5v to drive a 12v motor or a resistance load.

jim