......the signal wire goes to Arduino digital pin as input, and also to + 5VDC on the Arduino through a 10K resistor (that's the part I am unsure of)?Also I will be running 6 Prox. Sensors, supplying them with a +12VDC 25A.I assume I am ok there?I am also powering the Arduino with +5VDC through the Vin pin.Thanks so much for your input!Mark
Use a NPN at 12 volts. Connect 10k R to 5v and read digital input.The NPN will switch to gnd and there is no risk to your Arduino. 12 volts on the sensor is well within working range.Weedpharma
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