Joule Thief

[gadgetmall]

@jeanna
         Look about three or 4 pages back . the bridge can salvaged from a pc power supply . is a black thing with 4 wires . its marked on it where ac in and your plus and minus out or make one with 4 diodes and the two wires extra connect there giving you a good dc out .

@ALL
DID you all know that the Leds produce voltage like a solar cell . they sure do .1.5 volts at about 10 micro amps . just shine another led in one and measure the voltage off the bare one .. i hooked up two in series and got 3 volts . just something else to think about here . I'm waiting on some parts for my big 4 inch toroid and a breadboard as i am tired of breaking the legs off my little transistors and led....Also do your toroids attract a magnet? . just wondering

[Mk1]

@jeanna

Yes the pickup coil is not connected to any thing but the bridge diode.

And for the leds i know, i made a small solar power supplies that work from a candle , well placed i got 1.1 volt per leds from a candle,and from a regular bulb 1.5 per led , connecting led in series you ad the voltage , parallel you get more amps but still i got 6 micro amp that means that i should be looking at solar panels for amps.

Also the toroid when the voltage passes true it it is turned in a electromagnet. And the direction of the windings gives polarity to that
electromagnet .

And i really think that the led works on the jt because its AC.

[gadgetmall]

@jeanna
          If the Bridge power is more than the battery then try feeding it back to the battery...

[gadgetmall]

right i was thinking the power from the led is enuff to make a transistor to  turn on . if i take a high gain transistor i could multiply the current .

[gadgetmall]

@mk1
i meant without wire on them . do they attract magnets?? mine do. so im wondering if all the toroids from power supply's have iron in them ? or do ferrite attract magnets too?