Ok, I have checked the posts and can't seem to find a quick and dirty solution.
I am trying to monitor several 28 volt lines while operating under heat and vibration. the circuit doesnt have to whithstand the vibration and temp but I would like to build an independant voltage monitor for each line. I would like to use a LED to indicate the voltage dropping below 28v. I have tried a LM 317 but the leakage keeps the LED on below 28 volts. I was looking into LM 393 but I don't think this will work for me. If I go with a 24 volt regulator will it shut off under 24 volts? Any help would be appreciated.
Thanks
C