I'm trying to figure the best way to protect the external circuit from a short if a user mistakenly connects the sensor in the wrong polarity. I use a green object in the diagram to represent the second circuit.
The simplest polarity protection is a single diode on the positive side, but i'm considering what would happen if they connect the positive side to the ground on my circuit? Both circuits will share common ground. I'm not sure if what I have below would protect against anything or even work. Then again i'd have to contend with diode voltage drop (maybe use schottkey? i dunno). What do you think?