Gravity: 4 Channel Relay Shield for Arduino

Introduction
This Relay Shield for Arduino acts like a switch. It is commonly used to control anything over 5V such as lamps, water pumps and garage doors.
One of the most interesting projects for your boards is perhaps being able to control High power devices like Lamps, water pumps, garage doors and so on. But interfacing with high power and AC is quite a dangerous task when building the circuitry. Relays allow for interfacing an external electrical circuit like a switch. With relays you can now connect external circuit or devices directly to your Arduino.
This Arduino Shield is a completely newly designed that is able to control 4 relays at a time. The max switching power DC 90W or AC 360VA gives direct control by Arduino Uno/DFRduino controllers through digital I/Os with external 9V supply. With built-in Xbee socket, it can be wireless remote controlled via Xbee/bluetooth/WPM.
This arduino relay shield is an ideal solution for home automation and robotics applications.
NOTE:The Arduino board requires an external power supply to drive the xbee module and relays.
Warning:Pay special attention to the voltage that is over 38 volts.


Project 1: IR Home Automation based on DFRobot's Relay Shield
Materials:
Arduino UNO Rev 3
4 Channel Relay shield
IR Kit for Arduino
Features
Compatible with Arduino UNO Rev3
Each Relay has its own test button to test the connection
Standard DFRobot 3 Pin out
XBee I/O direct control
Specification
Compatible with Arduino Rev3
4 buttons to test module
LED status indicator of relay
Support Xbee IO directly control
Xbee socket for wireless communication
Selectable digital IO pin for control(Default digital 2,7,8,10)
6 channels Analog IO & 13 channels Digital IO
Up to 4 Relay with photo-coupled circuit
Contact Rating 3A AC 120V / DC 24V
Max Switching Voltage AC 240V / DC 60V (Less than 38V is recommended)
Max Switching Current 5A
Max Switching Power AC 360VA / DC 90W
Electrical Life (Min) 100,000 Operations
Mechanical Life (Min) 10,000,000 Operations
Safety Standard(relay) UL cUL TUV CQC
Coil Working Voltage 9VDC
Working temperature -30¡æ to +85¡æ
Working Humidity 40% - 85%
Size:95x65mm
Shipping List
Relay Shield for Arduino V2.1 x1
Nylon stand-off with screw x2