Re: Can I use the computer ATX PSU to power electronics circ
5V is still 5V - doesn't matter where it is comming from ..
If your 5V circuit draws 50mA, it will draw 50mA from a 50A (5V) power supply ..
If you want to be safe, use some sort of fuse, for example, 100mA-200mA on 50mA circuit .. similar effect you can achieve by using a 1Ω-2Ω/0.1W resitor ..
And, dont forget to connect pin 14 (green cable) to any BLACK cable to get it (the PSU) working .. see picture below ..
Regards,
IanP