Hi there! I have a system that have 3 differents input that can supply the system when 2 of the other input are not there. I have a 48VDC, 120VAC and an input that can be between 120 to 240VAC. But since this 3 voltage can be at the entry of the system at the same time, I need a detector to see which voltage is present. On the PCB there is a detector for each voltage but this is a resistive divider. I remake the design of this supply and I would like to know if there is another way to detect the voltage without to consuming to much energy?