1) You start by saving the following file to disk teensy-kb.zip you need to unzip the file giving you teensy-kb.hex.
2) You need to get the teensy loader from here: https://www.pjrc.com/teensy/loader.html
3) You install the loader and open the file you saved to disk in step one
4) You press the black program button – the teensy loaded should load the program. (you might need to click the auto button if you don’t see the progress bar flash by)
DO NOT PRESS THE BLACK BUTTON AGAIN UNLESS YOU WANT TO PROGRAM IT AGAIN.
When you connect the teensy to to your computer it will work as follows. Its light will blink for about 15-25 seconds then blink rapidly for about 8 seconds then the first four digits will be entered 0000 – this process is repeated until it reached 9999 this will take up to 47 hours for the teensy to reach – this program just highlights the versatility of using the teensy to simulate key presses on your computer..