DIY Infrared transmitter for iPhone, iPod

Step 3 Tape the wires

To clean up, we need to place electrical tape around each of the exposed wires.
What I've done is tape up the Left channel and RIght channel separately and place another tape around the ground wires to prevent any unwanted wires being crossed. 

Once this is done you are ready plug it in any portable music player to playback an audio track with infrared timings. 

Comments

[humxa]

where to connect the ground wire?

[alaskanbychoice]

The ground wires are tied together and insulated. The two power wires go to the LEDs and are hooked up opposite of each other. DSLRBOT explains it all.

[dmclaughlin1]

I was wondering as well about the possibility of using mp3 files as a source as well. I've got a working IR receiver input into the sound card on my computer. I get good signal on an oscilloscope, and can see that same waveform in an audio processing app (I use soundforge). I'm trying to build the transmitter now.

Can I just play back the mp3 and get the desired result? If so,
What should the audio file sample rate and bit depth settings be?
Do there need to be any resistors, capacitors, external power added to the LEDs?

I've testing the transmitting LEDs and I can see the signal on a camera but when aimed right at the tv, nothing happens. Any thoughts? Many thanks.

[msouza]

BTW, thanks a LOT to Share this. I will test it today ! :)

[msouza]

What about the LEARN scheme ? Do you have it ? And do you have any clue to make an workflow to Record and reproduce the "commands". Just link buttons to Mp3 files and play them ? :)