I have a large board which asks for three power supplies, +3V, +3.3V and
+-5V. First two can be easily satisfied with two HP power supplies (each has its own GND pin also). Regarding +-5V, can I replace with an HP power supply set to 10V, -5V pin connect to HP's ground and +5V to power?
No it won't work. The -+5V need a ground reference too. The ground is probably common between the power supplies so you will get 0V into the -5V input and 10V into the the +5V input.
Ross
Consider an ATX power supply from a computer, it has all of these and is cheap.
Russell
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