DFRobot DFR0643 Gravity: Easy Relay Module incorporates a standard Gravity sensor interface and makes it easy to connect main-control boards such as Arduino, control board, etc. This module supports a wide voltage input range of 3.3V-5.5V, with a 3.3V control board and 5V main control board compatibility. The DFR0643 Gravity: easy relay module is ideally suited for use in robot control, light control, smart home, and security.
The DFR0017 is also a standard relay module that is used with a controller board to interface external electrical circuits or modules. The modular design makes it easy to integrate with a controller board. Some of the most common applications with Arduino include home lighting, electrical appliances of high power, and other equipment.