At first they were confusing, but there was a well worded example on the website on how to use them: The Arduino sends keys using "scan codes" these are universal to any PS2 keyboard, so it could probably work on a Mac. To connect it to the computer i just have to connect the two digital pins specified in the code to the appropriate pins in a PS2 connector and plug it in to my computer. The program is pretty similar to the TV sonar control program except it sends PS2 commands for tabbing, volume, copy and paste.
Once i learn more about C# I may redo it, but using the PS2 emulator is the far easier option. I could either send data via serial and have a C# program interpret the data and emulate a key press accordingly, or I found a way for the Arduino to act as a PS2 keyboard. I wanted to control my computer with a Arduino and sonar module, but wasn't exactly sure how to connect the computer and Arduino.
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