I have seen multiple discussions on determining the presence of AC power. Most revert back to Current Monitoring for logical reasons. In my case I can not guarantee that there will be current flow. I have looked at relays, but I am concerned about the size of all the units that I am finding, the coil life and the heat generated from the coil. I have also been looking at Solid State Relays but am having trouble finding any that do 120VAC input smaller than a brick. The load is only 5VDC and is driving an input of my micro controller, minimal current.
I am at a loss on how to accomplish this. Any help is much appreciated.
I am at a loss on how to accomplish this. Any help is much appreciated.