This instructable intends to show you how to create a small & simple infrared (IR) receiver for your computer. The configuration of the software is beyond the scope of this instructable, but I use this receiver with LIRC (Linux Infrared Remote Control) in Linux. You can read more about LIRC and see the circuit diagram I used to build this at http://www.lirc.org/
Note that --I did not design this circuit-- and I wasn't the first to put the circuit into a D-sub connector... but I was the first to post an instructable on it, so hopefully someone will benefit from this : )
My total cost was about $1.50 because I had to purchase an IR receiver, but everything else I had lying around because I'm a computer guy/electronics geek.