Personal computer power switch
Personal computer power switch
I'm designing a DIY PC power button switch board connected to Home Assistant for an innovative startup experience. I need to understand the low voltage and current specifications of a standard PC power button.
I believe the power switch operates at 5V, but I’m hesitant about turning off devices from the 5V supply provided by the front IO headers—they aren’t built for high current. A better approach would be connecting the microcontroller via a SATA/MOLEX connector, then using a relay to block the power button connections.
The 5V supply works well since Raspberry Pi GPIO outputs provide that voltage, which is ideal. The idea is to run the Pi separately from the computer, using its GPIO pins to power the PC and deliver the startup signal. This setup would make it easier to expand beyond just a PC later on.