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ATX Power Supply

Added by ichilton about 5 years ago

Interesting post here about re-purposing an ATX power supply: http://jeelabs.org/2012/06/07/tk-cheap-power-supply/

It mentions about current sensing and limiting.

Anyone know of any circuitry to achieve this?

Would it not be ok to just add some fast blow fuses on the outputs?

Thanks,

Ian


Replies (1)

RE: ATX Power Supply - Added by padvinder95 about 5 years ago

I suppose that is one way to go, or include a PTC fuse (see e.g. http://en.wikipedia.org/wiki/Resettable\_fuse).

If you want more control, you could use an OpAmp together with a shunt resistor to monitor current (voltage drop across the low-valued resistor) and turn off a MOSFET transistor if it gets too high. I would suggest searching the web for “current limiting circuit” to find various solutions: from simple transistor-based circuits to special current-limiting ICs.

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