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JSimmons · 06-08-2005, 08:13 AM

I want to make a 2nd psu come one with my system is powered up. I know I can use a relay and a couple of connectors to do it, but I don't know which relay to use.

I've seen some people talking about only needing to short together one pair of wires on the secondary PSU, and I've seen others do 2 pairs of wires.

1) I'm going to go ahead and assume that I need to sshort two pair of wires, and I know that the relay has to be 12 volts DC, but how many amps should the relay be able to handle?

2) Do I need a single-pole-double-throw relay or a double-pole-double-throw relay?

3) Can someone recommend a Digikey part number?

4) Does the relay need to be actively cooled, or can I just button it up in a small project box and forget about it?

06-08-2005, 08:13 AM	#1
JSimmons Cooling Savant Join Date: Apr 2003 Location: 4-sided room with an exit going east, and an exit going south Posts: 392	Two PSU's In a Case I want to make a 2nd psu come one with my system is powered up. I know I can use a relay and a couple of connectors to do it, but I don't know which relay to use. I've seen some people talking about only needing to short together one pair of wires on the secondary PSU, and I've seen others do 2 pairs of wires. 1) I'm going to go ahead and assume that I need to sshort two pair of wires, and I know that the relay has to be 12 volts DC, but how many amps should the relay be able to handle? 2) Do I need a single-pole-double-throw relay or a double-pole-double-throw relay? 3) Can someone recommend a Digikey part number? 4) Does the relay need to be actively cooled, or can I just button it up in a small project box and forget about it? __________________ My Watercooling Stuff