Hi there, I have a positive voltage that can be from 0v to +150v. I would like to measure when it's 0v, so the attached circuit is what I was thinking about.
The IC is a TC4468. The idea is that when the voltage is >0v, the diode blocks and the 12v goes to the TC4468.
When the voltage is 0v, the diode pulls down the TC4468 input. However, the UF4007 has a voltage drop of 0.8v, just the upper limit for a logic
0 input. The question is, is this a good idea? Is there a better method to do this?