Thank you. You are so nice to help this beginner. I am glad to know that the 3.3 VDC to the main board is correct.
No problem!
You say that ”Once the MCU received the 3.3 volt and the vga signal cable is connected then it will send a on signal to the optoisolator circuit to trigger the main power supply. ”
I have found the return path for the signal to the optoisolator (the blue wire) from the main board to the standby power supply. It should turn on the optoisolator for the path then goes to the main power supply to turn it on. I assume the on signal I am looking for is a 3.3 VDC signal here.
Yes it can be that voltage. As long as the signal is more than 0.7 volt it can be used to trigger any circuit that use semiconductor.
What do you mean by vga signal cable? Is it the wire bundle from the Main Board to the Power Supply or is it an external signal cable, as an antenna or computer line that must be connected to the main board for the MCU to work?
Vga signal cable means the Signals coming out from the computer (RGB, H and V signals) and to the lcd monitor motherboard
No problem!
You say that ”Once the MCU received the 3.3 volt and the vga signal cable is connected then it will send a on signal to the optoisolator circuit to trigger the main power supply. ”
I have found the return path for the signal to the optoisolator (the blue wire) from the main board to the standby power supply. It should turn on the optoisolator for the path then goes to the main power supply to turn it on. I assume the on signal I am looking for is a 3.3 VDC signal here.
Yes it can be that voltage. As long as the signal is more than 0.7 volt it can be used to trigger any circuit that use semiconductor.
What do you mean by vga signal cable? Is it the wire bundle from the Main Board to the Power Supply or is it an external signal cable, as an antenna or computer line that must be connected to the main board for the MCU to work?
Vga signal cable means the Signals coming out from the computer (RGB, H and V signals) and to the lcd monitor motherboard
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