Hi, I have a somewhat unusual situation. I need to power a large number(200ish) of circuit boards. The input is two +12v and two grounds(A pheonix connector), but I only need to provide one +12v and one ground. Constant draw, ~120 watts.
So far my solution is this:
1. Take a computer power supply with several PCI-E outputs. PCI-E is +12v and a ground, rated up to 150w, using 5 grounds and 3 +12v wires.
2. Cut off the ends of all 8 PCI-E cords, strip them. Now they can go directly into the pheonix connector, but with 8 stranded wires this is a pain(x200 times).
3. Join the 8 wires together with 2 wire nuts, one for +12v and one for ground. Out of that comes a 14ga solid copper wire(So I don't have to twist the strands).
4. That goes directly into the pheonix connector.
So this process works. It also provides stable +12v, and can take any range of input(100-240v), which is nice.
This is really inefficient though- I have to strip 12 wires per and use two wire nuts. One PSU is like $200, powers 7-8 of these.
What are my other options to provide stable +12v power to these devices? Is there maybe an adapter I could buy or find that would take a computer PSU's +12v into a pheonix connector? Is there some way to make this more efficient than what I've already got? A better power supply/converter perhaps?
If it matters my inputs will be 120/208 three-phase.