John Hebert wrote: >I am testing some old motherboards. I would like to >test them without having to mount them in a PC case, >i.e.; on a table top with just a power supply, monitor >and keyboard plugged in. > >How would I power the motherboard on? I assume I would >need a spring loaded switch, one that completes the >circuit once it is pushed. Would this be a SPST >(single pole, single throw) like a rocker switch? I >usually get this kinda stuff at the RadioShack near >where I work, so I'm thinking SPST Heavy-Duty Rocker >Switch catalog# 275-690 is what I need >(http://www.radioshack.com/category.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F011%5F002%5F015%5F003&Page=1). > > You need a DPDT (double pole, double throw) switch as the PSU's on the old machines are wired to switch both live and return wires. I'd also (speaking from experience) make damn sure that the wires to the switch are well insulated so that you can't bump into them. Alternatively, if your PSU has an on/off switch, you could just solder the power switch wires together (insulate them) and use the power switch on the back of the PSU to turn the whole thing on and off.
-- Change is inevitable, except from a vending machine.
