Changes
It might be possible to use a LM317 for the voltage control.
= Options =
I suppose it is good to have at least 2 LEDs, a red and a green, each with a 220R in series. turning on the PSU can be done with a SPDT switch, that is: on1 - on2.
* red LED is between on1 and purple (standby 5V)
* green LED is between on2 and grey (power OK)
* green cable is soldered onto on2
* middle point of the SPDT switch is on GND
this has the following consequences:
* when PSU is on mains and switched off, the red LED is on
* when flipping the switch, PSU turns on ; after about a second the green LED lights, indicating all is good.
= Components =
