OPI with the PC power supply
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 ?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.
This is a great knowledge. Thanks. You canconnect the +5V SB pin to pin 4 on OPi gpio header, and ground to pin 6.(this work on my setup)
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