Step 1: Material
-An arduino (any board should work)
-Soldering iron and solder or a breadboard
-A 10k resistor
-Any playstation 1 or 2 remote
-A playstation socket (optionnal)
Step 2: The hardware
You will also have to put a 10k resistor between the data pin-digital12 and red wire-5V.
If you use the remote socket, just follow the picture i sent.
Step 3: The software
You will need to connect the remote to the arduino before uploading the code to it.
If you need help, feel free to comment and if you know a easy way to share C# projects on Visual Studio, i could give you my source.
Also, do not forget to keep the .dll (additional library) next to the .exe or it won't work.