The Relay Shield provides four high quality relay that can control high current loads to Arduino boards. It also provides NO (Normally Open) / NC (Normally Closed) interface. It could be a nice solution for controlling devices that could not be directly controlled by Arduino’s Digital I/Os. Standardized shield form factor enables smooth connection with Arduino and compatibles. The shield also has four LED indicators to show the on/off state of each relay.Relays are useful in switching on/off AC appliances like fan, light, motor or high current DC actuators like solenoid valve etc…
· Digital 4 – controls RELAY4’s COM4 pin (located in J4)
· Digital 5 – controls RELAY3’s COM3 pin (located in J3)
· Digital 6 – controls RELAY2’s COM2 pin (located in J2)
· Digital 7 – controls RELAY1’s COM1 pin (located in J1)
Package Included: 1 * Relay Shield V2.0 4 Channel 5V Relay Swtich Expansion Drive Board for Arduino UNO R3 Development Board Module One
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