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pHaestus · 05-05-2002, 08:29 AM

IT was pointed out to me in e-mail that using a solid state relay (no mechanical parts) would be simpler and probably more reliable than the relays that I wired up. If you are using a relay then you might want to start there.

As far as setting off alarms goes; if you can power an LED then you can do other things as well. I would think you could get an alarm that runs on 12VDC and use a relay that is NC and activated by 110VAC (from the relay of the pump). Plug the alarm into the PSU's 12V, and if the relay controlling the pump doesn't supply 110 to the pump side then the alarm would sound.

Might be simpler to just skip the alarm and tap into the PWR_GOOD line from the ATX connector? If the relay doesn't work then you wouldn't be able to power up the system.

05-05-2002, 08:29 AM	#2
pHaestus Big Player Making Big Money Join Date: Aug 2001 Location: irc.lostgeek.com #procooling.com Posts: 4,782	IT was pointed out to me in e-mail that using a solid state relay (no mechanical parts) would be simpler and probably more reliable than the relays that I wired up. If you are using a relay then you might want to start there. As far as setting off alarms goes; if you can power an LED then you can do other things as well. I would think you could get an alarm that runs on 12VDC and use a relay that is NC and activated by 110VAC (from the relay of the pump). Plug the alarm into the PSU's 12V, and if the relay controlling the pump doesn't supply 110 to the pump side then the alarm would sound. Might be simpler to just skip the alarm and tap into the PWR_GOOD line from the ATX connector? If the relay doesn't work then you wouldn't be able to power up the system.