Joule Thief

[broli]

Has anyone used the secondary with some diodes on the running battery to recharge it? I believe GM has been doing this but besides him I haven't seen other circuits doing this.

Edit: Looks like I found my answer two pages ago.

[gadgetmall]

Hi Gang . OK i have another surprise . This is the Jt i built for Paul but instead am sending it to My Friend Alex ! . NOW someone tel me if this is normal . This is the Exact circuit i posted in the SSJT thread on page one . Using the exact same parts . and # 26 wire for both 11 turn primary and 22 turn secondary .. OK now CHECK this out PLEASE ,,
Picture one is the simple Standard super JT i call this one . It must be the transistor . The black thing is a big ole one ohm resistor . This is where i check the current draw of the circuit . I did check it without it and same measurments . and i checked it with two meters  both are the same ..OK
Pic two is the voltages  of the battery and the output of the CE junction thru a germanium 1n60 diode on the ce junction ... OK NOW
Pic3 is the current draw of this circuit  and the output current of this circuit . Measurements are don simultaneous  . Basically the ampmeter is shorting the output to get those reading minus the volt drop of the diode . So the Led remains lit  a bit . Voltage of the aa battery is 1.273 drawing 3.09 milliamps and the output is 3.252 volts at 21.63 milliamps . NOW IS THIS NORMAL or have i just never paid attention . Can some one tell me what this means .other than what i think it means  ?? PLEASE . anyways Alex is getting this on ein the mail tomorrow !!! Have i just made another discovery or is this old news to get more out  than in . volts and current  Remember i check this with two meters  and swapped them just to be sure it was not a meter problem ..

ALbert

[Mk1]

@Gadget

That is about right you got those readings at the led ?

That is what it takes to light the led , now what would you have if you use 2 leds in series , or in parallel , would you have the same output?

Also the pulsed circuit is usually hard to determine , since pulse in and pulse out , unless they have the same freq , like in the jt .

Mark

[gadgetmall]

NO MK1 .. The led is lighting off the 22 turn secondary . I am not measuring it at all . As i said . I am measuring input voltage and current and voltage off the Collector and emmiter as in the circuit i posted in the SSJT thread on page one . I have two wires on that transistor junction . the collector one is running thru a 1n60 . these two wires are what i use to char up a bcap . NOW tell me this is right > if i am pulling 3 milliamps at a lower voltage and outputting a higher ma at a higher voltage  is normal ? yes ? forget the led it don't count . Please tell me because this don't sound right to me . Normaly you would get a lower current  output than in i thought .

[Mk1]

@gadget

You are not the first to so those numbers i did my self ...

But lets assume they are wrong ...

So you get the same result with and with out secondary leds ? ok.

i just got a idea what if we make a jt with a Hv secondary connect a at one end and a cap , the cap discharged in it own winding closed circuit , so you would have a HV kick a la tesla on top of the regular kick...

edit I don't really know but , since the jt coil are the same number of turns they are a 1to1 transformer you should have the same amps and voltage ?