seeed studio Grove Infrared Emitter User manual

RB-See-184
Seeedstudio Grove Infrared Emitter
Grove - Infrared Emitter
Introduction
The Infrared Emitter is used to transmit infrared signals through an infrared LED, while there is an
Infrared receiver to get the signals on the other side . An infrared LED is like any other LED, with its color
centered around 940nm. We can use the emitter not only to transmit data or commands, but also to
emulate remotes to control your home appliance using an Arduino. The Infrared Emitter can transmit
signals reliable up to 10 meters. Beyond 10 meters, the receiver may not get the signals.
Features
Grove compatible interface
940nm IR LED
Application Ideas
Remote control
Mechanic Dimensions
Mechanic Dimensions
20mm by 24mm. The IR LED extends by another 7.5mm beyond the PCB.

Usage
The IRremote library used in the example below relies on using Pin 3 of the arduino for PWM output.
For non-IRremote based usage of this Grove, other pins could be used.
Hardware Installation
Connect the Transmitter module to Digital I/O 2 of the Grove - Base Shield on the receiving arduino.
Programming
The demo below is the IRsendDemo.pde example provided by the IRremote library.
Download IRremote.zip and unpack into arduino/hardware/libraries in your arduino installation.
/*
* IRremote: IRsendDemo - demonstrates sending IR codes with IRsend
* An IR LED must be connected to Arduino PWM pin 3.
* Version 0.1 July, 2009
* Copyright 2009 Ken Shirriff
* http://arcfn.com
*/
#include <IRremote.h>
IRsend irsend;
void setup()
{
Serial.begin(9600);
}
void loop() {
if (Serial.read() != -1) {

for (int i = 0; i < 3; i++) {
irsend.sendSony(0xa90, 12); // Sony TV power code
delay(100);
}
delay(3*1000);
}
}