OPI with the PC power supply

y52 · Published in 2016-4-12 03:48:25

I wonder if it is possible to power up the OPIs with the power supplies from classical PCs, like ATX ? What would be the wiring to switch on the power and bring the 5 V to the SBC ?

gnasch · Published in 2016-4-13 07:14:13

you would need something like this:

http://www.ebay.com/itm/321914510023

for the power connection.

To run the opi, i connected ground (black) and +5V SB (Pin9, purple) to this connector.
My ATX supply delivers 2.5 A on standby, without even being switched on.
This way the opi runs silently.

via software, using a GPIO pin and a Transistor you can pull down PS_ON (Pin 14 or 16, green)
to start the power supply and power LEDs or motors or such.

y52 · Published in 2016-5-5 20:58:59

This is a great knowledge. Thanks.

Mritke · Published in 2016-5-20 20:00:17

You can connect the +5V SB pin to pin 4 on OPi gpio header, and ground to pin 6.(this work on my setup)