Friends, how about, I wanted to put a probe with LEDs. The idea is to be able to measure 110v 220v and 380v and turn on 1 led for 110v, 2 for 220v and 3 for 380v. I was checking circuits out there and I put together what they see below, the LEDs would be 5mm, I think the current range of these is from 5 to 20, tested in the worbench anda, the issue is if from experience they could guide me if it would work when assembling it, of course it would be necessary to modify the values to commercial. Apart from possible improvements to the circuit I would like to know if they consider it necessary to put the zener, they supposedly prevent the LEDs from being burned by the reverse current, but I have seen that in practice a led with a resistor connected to alternating does not burn, even without zener. Thank you very much in advance, any comments add up circuito.png test point [7.77kb] greetings jorge

The zener must be mandatory because they perform two functions and both are intended to protect the LEDs so that they are not destroyed.