I needed a good power supply for my plastic bender project since the battery lasts only a few minutes. So I decided to Build a robotics/logic lab power supply out of an old computer ATX Power supply . Taking a break right now, so I thought I would share it here.
Not much room inside, Not enough for the bare minimum I would need to squeeze into it. So I bolted a project box on the outside for the power posts/banana plug sockets. I also moved the fan from the inside to the outside of the case. This makes room for the 25 watt, 10 ohm power resistor and the non existant power switch.
I was considering adding a variable output port, but this particular power supply is ideal for this project. The power options it already contains are +12v, -12v, +5v, -5v, +3.3v and common GND. With these options it provides just about every voltage I need. I could also plug in a variable voltage regulator if I need it (without trying to squeeze it into the case) .
The only thing I don't have figured out is one wire marked '3.3vrs'. Same color wire as the +3.3v wires. I assume it is '3.3v remote sense'. So it would regulate the 3.3v output? I just tie it into the 3.3v wires? That is what I would think, but no idea if it is correct. Anyone know for sure?
Thanks for looking.
Ed