The Raspberry Pi Relay Board gives your Pi the ability to control high voltage/high current devices, easily making normal home appliances become intelligent. Features * Standard Raspberry Pi 40PIN GPIO extension header * Supports Raspberry Pi 2/3/4 * 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 you 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 Board * 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 Resources Product WiKi: https://www.waveshare.com/wiki/RPiRelayBoard https://elecena.pl/product/22718941/raspberry-pi-relay-board 2023-03-07 https://elecena.pl/product/22718941/raspberry-pi-relay-board 2023-12-27 https://elecena.pl/product/22718941/raspberry-pi-relay-board 2024-09-19 https://elecena.pl/product/22718941/raspberry-pi-relay-board 2024-11-29 https://elecena.pl/product/22718941/raspberry-pi-relay-board 2024-11-30 https://elecena.pl/product/22718941/raspberry-pi-relay-board 2025-08-05 https://elecena.pl/product/22718941/raspberry-pi-relay-board 2025-11-28 https://elecena.pl/product/22718941/raspberry-pi-relay-board 2025-11-29