1.6 Psu Without Motherboard Options

[maniaci137]

Basically, I am using an old v1.6 Xbox for a project. And I want to reuse as many things possible. So, I'd like to reuse the power switch and power supply.

Is there any way to use the front power switch to kick the power supply out of standby?

I was thinking maybe take 5V from a standby line, kick it down with a resistor use the front switch to momentarily put 3V3 on the PWR ON line. Would this work?

Also, does anyone know the amperage that the 5V standby lines give off? I couldn't figure out how to measure it with the cheap multimeter I was using...

[Bandit5317]

That will only work for as long as you're holding down the switch. Since it's a momentary switch, it will only complete the necessary circuit for as long as you're holding it down. I'm sure there are simple circuits out there that you could build that would turn a momentary pushbutton switch into a constant closed circuit until you pressed the button again, but I haven't built any. A simpler solution would be to use a switch that creates a constant closed circuit once you push or slide it, then goes back to an open circuit once you push it again or slide it to another position. If I remember correctly, the 5v standby line on the v1.6 PSU can put out a surprisingly high current, 1 amp I believe. Just a suggestion, but I would use something a little more reliable than a resistor to bump down the voltage from 5v to 3.3v, like a regulator, since the current draw is unknown. If the current draw from PW_ON is low enough (it should be very low since it's a signal line), you might even be able to get away with just sending the PW_OK voltage to the switch, but I don't want to be held responsible for ruining your power supply if the current draw is too high.