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Would an SPST switch work for this, or does it have to be an SPDT switch? For my own car computer, I don't see the need to have an "always on" function, since that will be draining the battery. I'd rather just be able to control it as ON so that the Opus or M2-ATX (haven't decided which yet) controls the startup and shutdown, and OFF, so that I can prevent the computer from starting up at all if I'm just pulling the car out of the garage to wash it, or just going to get gas or smokes.
I'm planning to wire my Opus or M2-ATX directly off the battery via a relay to the ignition, and would like to wire a manual switch in there as well. So will an SPST work, or does it have to be an SPDT switch? I guess I don't understand switches and relays enough to know the difference between SPST and SPDT in this kind of application.
'01
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