Joule Thief

[xee2]

@ jeanna

yes, the bjtl goes on, and the scope says 1067v from [1] to[3]
Actually the scope says the same 1067 from [2], to [3] also.

j

I have no more suggestions.  I built this, kooler built this, lidmotor built this, and it worked for all of us. I do not know what else to suggest. You may be correct in thinking the diodes are bad. You should be able to check that with a 4.5 volt battery (3 AA in series). Put the diode in series with an LED and see if the LED lights with the diode one way but not with it reversed.

[innovation_station]

@ist

I should have invited your coil at my party last week , nobody felt like dancing.

lol i felt like sleeping ... 

silly ness


lol

MK1

think i can pull ac easly from it ?   

and i already mesured 106vdc and like 30vac ...  something like that ...  just normal jt tap points


the damm thing is quite annoying ...  i must for warn you !

it goes to 5k as curently showen ...

w

here is 1 more tip i found ... with a unit such as this .. if i raise the voltage ... i can get bigger bounce at lower freq...

: )

[xee2]

lol..
i'll report back tomorrow..
maybe by then it will fall some.. quick question should i see a volt loss in 8 or more hours with me pulling 0.45 ma's
or do i need to let it run for a week or so..
sorry if that sounds dumb.. but i have no schooling in electronics
i didn't know the what a resistor looked like till i started playing with this stuff back in march 2009

thanks for the help
robbie

AA battery is rated at about 2000 mah. That means it will run for 2000 hours at 1 ma before it drops to 0.8 volts. At 0.45 ma it will take 2000/0.45 =  4444 hours before it drops to 0.8 volts. I think you have a long wait ahead.

[xee2]

@ ist

Your jumping coil is interesting. Is there a conductive surface under it? Normally, there needs to be something magnetic for the coil to push against before it will move. Thanks for posting video.

[jeanna]

@ jeanna

I have no more suggestions.  I built this, kooler built this, lidmotor built this, and it worked for all of us. I do not know what else to suggest. You may be correct in thinking the diodes are bad. You should be able to check that with a 4.5 volt battery (3 AA in series). Put the diode in series with an LED and see if the LED lights with the diode one way but not with it reversed.

When you say you and kooler and lidmotor, it makes me think you are talking about a different circuit, like the one with 2 transistors or the one with the scr/triac. I do not remember lidmotor lighting a filament with a plain jt with secondary.

I will look for it.

jeanna