indicator turns on and if you power it up with 12V the 5V LED goes off and the
12V indicator goes on.OFF until I provide it a voltage drop of 5.6V, and since it's in series with some other stuff (resistors and an LED) I thought it would definitely be off at
5V, but it's on just enough to turn on my FET M1 and not let my D4 LED light up... I'm basically measuring a little over 1V at the gate.like 1k maybe, but why is D1 turning on at all? Is it leakage current that's causing this circuit not to work at 5V? D3 the 12V LED is definitely off at a
5V supply (as it should be) and the circuit works at 12V... but not at 5V...of the BZX70 transistor for the 12V level. The same for
Spice'ing it is no challenge. Draw something with a pencil, or better yet a pen, that will work first time.