Really great project!
What I didn't understand was why there is a need for a 7905 to convert -12V to -5V. It looks like that pin 20 should be providing the -5V already?
What I didn't understand was why there is a need for a 7905 to convert -12V to -5V. It looks like that pin 20 should be providing the -5V already?
-12V is still mandated and on all ATX PSUs, so it’s more compatible to get -5V out of that.