The traditional relay module has complicated wiring and is not friendly to beginners or students. This simple switch module simplifies the wiring method for connecting traditional relays. The input end is equipped with an adapter, which are compatible with many power sources, battery boxes, DC power supplies, power banks and more. While simplifying the wiring mode, the functions of relays NC and NO are retained, and the normally open and normally closed modes can be switched by simply adjusting the toggle switch. DFRobot\’s latest easy relay module uses a standard Gravity sensor interface and supports a wide voltage input of 3.3V-5.5V, making it easy to connect with a range of development boards including the Arduino. Meet your needs in control applications such as robot control, light control, smart home, security and more! Connection Example – Arduino Features 3.3 ~ 5.0V working voltage, wide voltage input, compatible with 3.3V control board and 5V main control board. Toggle switch to switch NC / NO mode easily, LED indicator shows output status. DC2.1 input and output interface, with the included adapter, plug and play, suitable for most application scenarios. Specification VIN operating voltage: 5V-30V VIN operating current: 0A-2.5A Logic power supply: 3.3 ~ 5.5V Logic signal: 3.3 ~ 5.5V Operating temperature: -55 -150 Switching characteristics: T (on) = 20us / T (off) = 50us Switching frequency: 1kHz Dimension: 37mm x 27mm Resources Product wiki Pinout Num Label Description 1 VIN Power input 2 VOUT Power output 3 Gravity interface Signal in Package Contents 1x Gravity: Simple Relay Module 1x Gravity digital sensor cable 2x DC2.1 power adapter male 2x DC2.1 male to male 1x DC2.1 female to USB male 1x DC2.1 female to USB female 1x Black acrylic base 4x Round head screw M3x8