DFRobot Relay Shield 2.1 for Arduino

DFRobotSKU: RB-Dfr-170
Manufacturer #: DFR0144

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¥2,534

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Completely new design capable of controlling 4 relays
Compatible with Arduino UNO Rev3
Each Relay has its own test button
Supply Voltage: 9V

This DFRoobot Relay Shield for Arduino V2.1 is a completely new design which is capable of controlling 4 relays. The max switching power could be DC90W or AC 360VA. It could be directly controlled by Arduino/DFRduinothrough digital IOs with external 9v supply. With a built-in Xbee typesocket, it can be wirelessly controlled via Xbee/Bluetooth/WPM, making itan ideal solution for home automation and robotics purpose.

New Features

Compatible with Arduino UNO Rev3
Each Relay has its own test button to test the connection
Standard DFRobot 3 Pin out
Stackable
XBee I/O direct control

PDF File

DFRobot Relay Shield 2.1 for Arduino - Schematics

Website

DFRobot Relay Shield 2.1 for Arduino - Wiki

Compatible with Arduino Rev3
4 buttons to test module
LED status indicator of relay
Support Xbee IO directly control
Xbee socket for wireless communication

Good practice shield

I like this relay shield for the following reasons: - Opto-coupler on relays for better insulation - Indicator lights, and manual buttons for relays, convenient for testing. - Integrated design well done - Simplicity of implementation The negative points are: - Pine used unmodifiable (pine 2,7,8,10) - Need an external power supply to operate the relays. It's a shame to use pin 2 for output while this pin can be used with interrupts. Without adding a library, pines with interruptions are rather rare on an arduino.

Not bad

I used this on a mega with the mega breakout board. My complaint is that I wish it was mounted 180 degrees so the end of the board hung over another section of the breakout board. Otherwise the shield itself works nicely and offers flexibility.