Joule Thief

[dasimpson]

Even though all joule thieves are on at the same time, they are charging their respective capacitor isolated from the others.

When the negative pulse acrivates the two pnps, the three capacitors are joined.

If what he wants is +Cap-+Cap-+cap- . That is a task out of my reach now.

Jesus

from what i read he wonts to charge each cap up then turn off the jule thief connects the caps in parralel only way i see this working is timed switches and relays
so when the multi terminal relay turns the jt off the terminals allow the cap to connect to the next cap the only prob i see is by the time the jt turns on again then that would shut off the draw from the caps

parallel will make the caps 360uf 300 volts
series would make it 120uf but 900 volts
this ant counting the losses

[nievesoliveras]

Another idea.

Jesus

[dasimpson]

Another idea.

Jesus

yeah that was the idea i was thinking he could then use a sinlge cap of high uf cos they be more jt fireing
and if not maybe another to discharge the caps into a larger cap
but on my experements hiting a large uf cap with a smaller uf cap did nit add to the carge allrady in the cap but just equlised it
meaning if small cap is 100uf and larg cap 1000uf hitting the large cap 10 times with the small cap when charged did not charge it to 1000uf but kept it at 100 or maybe i just measured wrong

but what i thoght a cap did is take volatge and change that into current (aka amapge) if this is so then steping up the size of the cap each time would end up with a higher amapge at each stroke like 100uf hits the 250 and then from 250 to 500 etc etc the voltage would stay the same but the ampage would go up

[jeanna]

This is an interesting avenue of thought. Cool.

What if you had 3 different capacitances?

Then, wouldn't they fill in different amounts of time automatically?

If they discharge when they are filled to a 3/5 level, then they would be charging and recharging at different rates?
I have never been sure what to do to make them dump the charge when they are full, so I cannot actually make this.
And, I would love someone to explain this.

jeanna

[dasimpson]

This is an interesting avenue of thought. Cool.

What if you had 3 different capacitances?

Then, wouldn't they fill in different amounts of time automatically?

If they discharge when they are filled to a 3/5 level, then they would be charging and recharging at different rates?
I have never been sure what to do to make them dump the charge when they are full, so I cannot actually make this.
And, I would love someone to explain this.

jeanna

ppl have used scr's to dump the power when full but thats past my knowledge the way i would to it is by a timer and working out how long till they are full befor they dump the power
my next post i have some home lighting i have done

the night shots are not very good
but they light the stairs and back bedroom god enoth to see the back bedroom could do with another to jt curcits so they would be 4 to power the 12 leds this unit normaly tulk 4 aa batterys and lit the room as good as a 15 to 25 watt bulb and theys run of solar panels from old garden lights