The Relay Shield utilizes four high-quality relays and provides NO/NC interfaces that control the load of high current. Which means it could be a nice solution for controlling devices that couldn’t be directly controlled by IIC bus. Standardized shield form factor enables smoothly connection with the Raspberry Pi. The shield also has four dynamic indicators show the on/off state of each relay.
Note: When carrying heavy Inductive load for a period of time, the on-board MCU might be down and a reset procedure is needed.