Well I understand that but I only want to have 3 wire inputs for the sensor which then has both LED's tied to the same spot just each turns on depending on whether it gains a sourcing or sinking output from the sensor? does that make sense? I don't really know what to do for that, a bipolar...
Homework Statement
Workinfg on a project for a teacher currently and need help designing the circuit for how to detect whether a sensor is PNP or NPN. I need to have 2 9V batteries power the NPN or PNP sensor and then have a spot for the third wire, where if it is positive output (PNP)...