Can I use a standard PC power supply to power a Raspberry Pi, e.g. iMicro IM400W 400W ATX12V Power Supply (or just take one from an old unused computer)? Amazingly, these things are sold starting from 1$.
Most people seem to be looking for small and lightweight power sources, but since we are contemplating to build a PCR machine, size and weight are not an issue.
So far I only see advantages (but maybe that's because I don't really understand electronics):
- Lots of power (like 20-30A): We are thinking about using a peltier element for heating and cooling (e.g. TEC1-12706 Thermoelectric Peltier Cooler 12 Volt 92 Watt). This one requires 12V and draws apparently up to 6A (and probably shouldn't be on the same circuit as the Pi, right?)
- Different Voltage outputs (3.3/5/12 Volts).
- Lots of cables. So I'm thinking we just pluck a 5V cable for the Pi, and a 12V cable for the heating element (right?).
- Nice on/off switch
- Nice casing
- Nice inbuilt fan
Any reason why this wouldn't work?