electronicsThe design of a switched mode power supply from scratch
When I purchased a Commodore 64 home computer, the power brick was slowly dying. Because of that, it was not save to power on the computer. Repairing it was not an option, as the power brick is sealed in epoxy resin. An other solution had to be found. I like to do things the hard way, so I decided to design and build a new power supply out of discrete components. It had to be a switched mode power supply, of course. Because of safety reasons I did use a normal transformer to step down the mains voltage to 9 volts AC, but after that a buck converter regulates the voltage to 5 Volts DC. And because I like the good old 555 timer IC, I used two of these in the regulator circuitry. Just because I could!
2020-10-25
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