I have what I believe is a Hall sensor removed from a shower pump where it was used to sense rotation of the pump
Unfortunately the sensor is potted and has no identifying marks nor any indication of what its 3 wires do. The 3 wires are unhelpfully coloured red, orange and yellow so, assuming that red is positive it is a guess as to which of the others is GND and which is digital out
Is it possible by measurement of resistance, perhaps with and without a magnet close to the sensor, possible to determine which wire is which ?
I know how to read a Hall sensor so If I go with my inclination and just try both possible arrangements (if red is 5V) with a 10K resistor between 5V and a second wire am I likely to damage the sensor and try reading the output using digitalRead() ?