Raspberry Pi "hat" to control: 2 RFID readers, 2 motors and 7 high-power LEDs

This is the hardware for the OSGi IoT Contest 2015.

It enables a Raspberry Pi to control:

  • 2 MF-RC522 RFID readers via SPI bus
  • 2 motors using SN754410 dual H-bridge
  • 7 high-power LEDs using ULN2003 darlington array. 


The IoT contest uses it to control a Lego train:

  • the RFID readers detect the train location
  • the motors operate the the track switches
  • red/green LEDs operate as train signals
  • an IR LED emulates the Lego remote control