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LED Capacitor Issue? Answered

Ok, so i have a non alterable power source of about .75 volts. I need it to power a 1.8v red led. I don't want to use the joule thief to accomplish this....so...Can I hook up a capacitor to store energy, then transfer it to the led? or how can i get the led to fully illuminate? THANKS!!

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westfw (author)2007-11-16

You can try this one. Somewhat more complex than the Joule Thief (TWO transistors!), but uses standard components and no home-made transformers.

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westfw (author)2007-11-16

There are some other circuits similar to the "joule thief", at least conceptually. Why is it that you don't like the JT?

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Joe426 (author)westfw2007-11-16

I couldn't get the stupid thing to work! :(

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Joe426 (author)Joe4262007-11-16

may be because i have a wrong ferrite, i just found one on an old Mobo, and used it.

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guyfrom7up (author)2007-11-16

Joule theifs are great, but I could never really get them to work. is it ac or dc? If AC you could use a voltage doubler or tripler cicuit. If DC then I don't know of a simple way without more complicated cicuits

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