Relay Shield

Relay Shield
Relay Shield

Relay Shield

Control normal outlets or high voltage electronics and remotely turn your electronics on or off.


Use the Relay Shield for the Particle Photon or Spark Core to control any normal outlet or high voltage electronics product to switch your existing electronics on and off from anywhere.

The shield has four relays that are controlled by pins D0, D1, D2 and D3 on the Core. Each relay is triggered by a NPN transistor that takes a control signal from the core and switches the relay coil ON and OFF, which in turn makes or breaks the electrical contact on the output. There is also a flyback diode connected across the coil to help protect the transistor from high voltage transients caused during switching.

The relays are SPDT (Single Pole Double Throw) type, which means they have three terminals at the output: COMMON (COMM), Normally Open (NO) and Normally Closed (NC). The shield can either connect the load in between the COMM and NO or COMM and NC terminals. When connected in between COMM and NO, the output remains open/disconnected when the relay is turned OFF and closes/connects when the relay is turned ON. In the latter case, the output remains closed/connected when the relay is OFF and opens/disconnects when the relay is ON.
  • Operating voltage: 7 to 15V DC
  • Current consumption: 150mA min to 290mA (at 9V DC)
  • Relay Max Voltage: 220V AC
  • Relay Max Current: 10Amp at 125V AC
  • Dimensions: 3.5 x 3.3
  • Weight: 100gms