The part list consists of one Arduino, two resistors, and one IR emitter. That’s right, an emitter. When an LED (IR or otherwise) is reverse biased it can act as a light sensor.

A single seven-segment display might not be extremely useful, but with [firestorm]’s tutorial, it’s easy to give your Arduino some remote control capabilities with a simple IR receiver.

In my case I have used only 3 x 330Ω resistors, 3 leds and a TSOP4838 IR receiver module. You must check the datasheet before use the IR module to see which pins connect to the power supply and which ...

Not sure if these work with a Harmony remote, but there are remotes designed for Media Center that come with USB IR receivers. Might just have to buy the package and toss the remote in a drawer.

I have a friend with an old kenwood reciever that does not work. I want to gut the case, and build a computer inside. I was thinking about putting an IR reciever in, getting a card for lcd control ...