Across the edge left to right are the breakout for:

  • 2 3-pin connections for traffic monitor, orange-blue LED pair.
  • 4 3-pin connectors for 3-LED signals in the Parking Lot.
  • 2-pin connection for the Fan control button.
  • ground pin for Parking Lot signals.


Raspberry Pi PWM HAT with modification (1)Raspberry Pi PWM HAT with modification (2)


















Wiring/PWM Pi HAT pin usage

Wiring for PWM Pi HAT GPIO pins