This voltage can be read by an Arduino digital input and then the Arduino can act upon it. ... PIR Pin “out” connects to Arduino Digital 2. Here is the Arduino code for the Parallax sensor.

Code developed for FrontiEV electric conversion. Relays driven by Arduino control 80amp relays for each heating element in the VW 12v heater (1K0963235F). Potentiometer has 5V and GND from Arduino ...