my bios is not doing it..
i think that the trigger has to be the 5 volt from my ATX power supply that "says" (magenta color cable ) to the motherboard that is ready to turn on (and supplies the modem or and the network card if they are waiting a signal to wake up on lan / or wake up on modem)
but here's the problem....
we have to make a circuit that..
.. if there's 5 volt at the input ( and not below that ) then after milliseconds.. the relay ( which is parallel to the on / off switch)
goes to the other position and turns on the computer..
but it can't stay at this position because it is like we hold still the on/off button and you know if you hold it for 5 seconds it turns of the computer.. so after let's say half of a second the relay must go to it's first position and stays there until the circuit loses for a long time eg 10 seconds ( avoid here micro-time-loss of network supply eg during a thunder strike) and then .. having 5 volt input starts triggering / cycling again....
for the 5 volt reference we 've got to have a 5V zener, for delay a capasitor charging or an 555.. a classic relay.. but how the circuit is gonna be?
... here i need your help.. thanks for your time...
well alternatively .. we can trigger it , simple, with the 220 V from the public network, but we must delay it so the ATX is ready to give full power to all the pc parts....