ATX Power Supply
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?
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.