Joule Thief

[gadgetmall]

@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 ?

Ok then i will assume they are wrong / Its a 1 to 2 design howevber . 11 turn primary and 22 turn secondary . I dont know what i get without teh led as My design requires an led on the secondary to indicate power is on . This led is FULL BRIGHT at 3 millamps 1.2 volts circuit drain but also FULL Bright FEEDING 21 milliamps at over 3 volts out to a bcap . . O thought i had discovered something but this is normal i will forget it .Thank you mark . Merry Christmas ..
Albert

[Mk1]

@gadget

You get those reading under load bcap connected ?

But really check with out any thing on the secondary i wonder what a regular single diode could do to reduce consumption instead of a led.

[xee2]

@ gadgetmall

It is certainly normal to get more voltage across the collector-emitter than the battery voltage. That is what allows the JT to light an LED from a 1.5 volt battery. I have gotten enough voltage to light a neon from a 1.5 volt battery with just the base and collector coils (no added pickuup coil).

It is not normal to get more current out of the collector than is being taken from the battery. I am not sure how you are doing that. Can you post more details about how you are measuring the current?

[xee2]

I built a 2 turn base coil, 10 turn collector coil, 150 turn pickup coil JT and tested it wit a 200 ohm base resistor using a 2N3055 and added the results to my chart. From this data it seems to me that after about 150 turns there is no significant increases in output voltage produced by adding more turns to the pickup coil.

[kooler]

i also notice the same thing and when you get past 270 turns it starts to kill your voltage...
lol.. i went to 732 turns to get only 74 volts,,, so i was like what
unwind 3 layers and boom... 632 volts

oh do we know what diodes tysb3 is using on feedback