Overview

The RPi Relay Board gives your Pi the ability to control high voltage/high current devices, easily makes normal home appliances become intelligent.
RPi Relay Board Features

•     Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
•     High quality relays, loads up to 5A 250V AC or 5A 30V DC
•     Photo coupling isolation, prevent interference from high voltage circuit
•     Onboard LEDs for indicating relays status
•     Relay control jumper, allows to control the relays by custom pins other than the default pins
•     Comes with development resources, including examples in wiringPi, WebioPi, shell, python, and bcm2835

What's on the RPi Relay Board

Raspberry Pi Expansion Board on board resource

•     Raspberry Pi GPIO interface: for connecting Raspberry Pi
•     Relay screw terminal: for connecting target devices
•     Relays
•     Photocoupler: PC817
•     Relay indicator
          LED on: relay NC is opened, NO is closed
          LED off: relay NC is closed, NO is opened
•     Power indicator
•     Relay control jumper
          short the jumper: control the relays by default I/Os used in the example code
          open the jumper: control the relays by custom I/Os through jumper wires