4 Relays Shield-board

4 Relays Shield

The Arduino 4 Relays Shield allows your Arduino driving high power loads.

The Arduino 4 Relays Shield is a solution for driving high power loads that cannot be controlled by Arduino's digital IOs, due to the current and voltage limits of the controller. The Shield features four relays, each relay provides 2 pole changeover contacts (NO and NC); in order to increase the current limit of each output the 2 changeover contacts have been put in parallel. Four LEDs indicate the on/off state of each relay.


The shield comes with 4 relays with a maximum of 48V loads.

Status LEDs

The shield comes with 4 status LEDs to know what state the relays are in.


Arduino 4 Relays Shield Basics

Learn the basics of how relays work, and how to control the four relays onboard the Arduino 4 Relays Shield