I made a backlit keyboard 12V LED strip on usb
555 timer generates pulses for the step-up on mje13003 of
fluorescent lamp with electronic ballast, I pulled out the coil, the output of the timer control I connected a resistor from the Soviet 10k color tv. worked well, but not for long. Now I put the converter on a transistor https://encrypted-tbn1.google.com/i...3MjByy35DHzZwoq0ak2fpqCeV-nIH-A18p9nnDQzoT5RQ
http://c.foto.radikal.ru/0605/9d4dde0f84e7t.jpg

 

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A thread belongs to the OP (original poster). Trying to take over someone elses thread is called hijacking, which is not allowed at All About Circuits. I have therefore given you a thread of your very own.

This was split from Simple LM317 Power Supply .