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Four Outlet Power Relay Module version 2
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Four Outlet Power Relay Module version 2

by Whatismyname on Sun Jan 17, 2021 10:21 am

Hi, I want to control a computer power supply rated at 1600 Watts to turn off and on will the Four Outlet Power Relay be my solution?

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Re: Four Outlet Power Relay Module version 2

by DanGR on Sun Jan 17, 2021 11:35 am

amps = watts / volts
amps = 1600/120 = 13.3A
The switch is rated at 12A
A different solution will be needed.

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Re: Four Outlet Power Relay Module version 2

by adafruit_support_bill on Sun Jan 17, 2021 12:20 pm

Most computer power supplies have a soft on/off circuit. So it is not necessary to switch the entire 13+ amps. You just need to find the power control wire on the motherboard connector and pull it to ground to turn on the supply:

https://www.instructables.com/How-to-Tu ... thout-a-C/

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Re: Four Outlet Power Relay Module version 2

by 42volts on Thu Feb 18, 2021 12:22 pm

1600 watts? You running a whole server rack on one power supply or something? Or just overkill to the max?

As suggested, find the 'ON' wire. No need for big power handling, and since its a "pull low to switch on", you can use a 5 cent N-channel FET like a 2n7000.

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