I have alot of ATX powersupplyies, i'm planning to use those for some of my experiments... where the first will be a bench supply.
I will probably only need +3.3v +5v +12v.
From what i read an old powersupply which has more ampeeres on the 5v side needs at least 1A of minimum current.... so i will prolly need 10ohm 10W dummy load... but i will test first if it shuts down.
Anyway the question is about the POWER_GOOD / P.G. cable and the POWER_ON / PS-ON ...
- The POWER_GOOD outputs HIGH wehen the powersupply's voltages are stabilized.
- To turn the powersupply on i need to attach the POWER_ON to the ground.
Can i do something like the following to turn it on when everything is stable?
Or is the POWER_GOOD only active after i ground the POWER_ON?
Another question that is less important...
There is also the +5v standby voltage. Those 5v are always on even if the power_on is not tied to the ground. Is that stable?? I could attach an attiny or whatever microcontrolller to turn on and off the powersupply, maybe wirelessly..and also a display that shows the various voltages. Most of the powersupplies i have say that the max output of the +5 VSB (standby voltage) is more than one amp.