Quote:
Originally posted by mikoto
how about THIS, with modifications of course. I assume it is designed for UK mains, but what the hell do I know? and wth is with the car batteries?
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Once you get past the messed up link...yup it's a linear power supply.
It's an acceptable basic design.
Just choose a transformer that matches your local main voltage. The transformer will the the biggest, heaviest, most expensive part of the project.
I don't know why it uses a transformer with such a high output voltage. A lot of power is being wasted heating up transistors. I'd use a one that outputs 12V/40A and beef up the first capacitor from 47,000uF to 100,000. Spend money on caps; save on electricity.
Rectifier diodes capable of handling 100A peaks were specified. I'd go with one that can handle 35A average forward current, and 300+ amps of peak current.
The car batteries thing is just for testing/explanation purposes. It would be a bit silly to use two 12V batteries to get 12V.