The Raspberry Relay board can control 4 relays using the GPIO pins. Ideal for controlling lights, coffee machines, swimming pool pumps, fans, other Raspberry Pis, or other high-voltage electrical appliances.

The board also breaks out the I2C and SPI headers, so controlling other boards is still possible.

Two types of relays can be fitted on this board: a relay that has been tested to handle 5A at 220VAC, and one that has been tested for 10A at 220VAC.

Raspberry Pi is not included. For documentation, see the wiki page.