Step 3: Loading Code on Teensy 2.0

While you can write your own code, there are plenty of resources available for keyboard layouts.  The best I have found is a Github repository by Hasu. All you need to do is download and run the program, select the keyboard layout (GH60 for the 60% layout), and save it. Make sure that headers on the Teensy match the columns and rows on the schematic on the application. Here is the link to the Github repository.

https://github.com/tmk/tmk_keyboard 

Once you have the file save, you need to flash it onto your Teensy 2.0. To do this, I would recommend using the program called the teensy loader application. You can find the link below.

https://www.pjrc.com/teensy/loader.html