Also if you just want to learn how to use IR to control your TV with your arduino this will help you gain some understanding. Or maybe inspire some awesome project and instructable ideas!
In this instructable we will be using a 10k potentiometer, IR LED, and an Arduino to control the volume (or anything else you want) on a TV.
Here is a materials list
NOTE: "*" means optional
Arduino (or clone, but the arduino Leonardo has not worked for me)
IR LED http://www.radioshack.com/product/index.jsp?productId=2062565
100 ohm resistor
IR receiver http://www.radioshack.com/product/index.jsp?productId=2049727
*NPN transistor and 1k resistor (if you want to amplify power to IR LED)
*regular LED and 470 ohm resistor
You will also need to download the IRremote library from this site:
and make shure to make it arduino 1.0/1.0.1 compatible by changing
Now Lets Begin!
Step 1: Get the IR remote library, learn about it, and get some remote codes.
go to http://www.arcfn.com/2009/08/multi-protocol-infrared-remote-library.html
and download and install the library
make sure to change
in IRRemoteInt.h. (to open IRRemoteInt.h and edit it, use Notepad on Windows, or Text Editor on Mac, but don't open with arduino IDE because it won't open with it.)
to make it arduino 1.0/1.0.1 compatable
On the page make sure to read about how to use the library and find the correct protocol for your device
check out the sending example and test it to make sure it works on your arduino
NOTE: picture 1 shows the sending code, and picture 2 shows the hardware setup for it.
then do the receiving test on your arduino to find out your remote hexadecimal codes by pointing your remote at the receiver and pressing the buttons you want the codes for, the see the codes in the Serial monitor.
make sure to write down the codes or store them somewhere for future use.
NOTE: picture 3 shows the receiving code, and picture 4 shows the hardware setup for the receiving code.
If you get all these to work then you are set to continue!