Here is an awesome project for that worthless computer power supply you have laying around. I was doing a project the other day where I needed 5 volts, and I connected a 9 v battery to a 5 v regulator. I connected something wrong, and it made it really hot, and it burned myself. I was thinking that I needed a 5 v power supply. My friend over at zerosign.net wrote about this, and it gave me the solution.
…Computer power supplies cost around $15, but lab power supplies can run you $100 or more! By converting the cheap (free) ATX power supplies that can be found in any discarded computer, you can get a phenomenal lab power supply with huge current outputs, short circuit protection, and very tight voltage regulation…
4 Responses to “DIY Cheap 5v power supply”
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This design has been floating around the ham radio circles for a while. It’s known in ham radio as the “St. Louis Switcher” for the city where the guy that came up with the idea lives.
If you need a ‘clean’ power source, this probably isn’t it, but for almost every general purpose, this is a great cheap solution…
Do you have any good ideas for a clean power source? I am interested in a power supply that does not have too much noise, that can be used for audio.
Not sure. I know you can make filter circuits to go inline for the power, just an RLC circuit I believe, but I’m not sure of any values of the components, or even how to design a filter for that use.
my AIM: GrendelT