Source code

Original code for the Pro Trinket bootloader on github
We do not offer any support for this code, it is released as-is!

Please note: you cannot use the Adafruit USB VID/PID for your own non-Trinket/Gemma products or projects. Purchase a USB VID for yourself at


Pro Trinket 5V 16MHz:

Pro Trinket 3V @ 12MHz

Fabrication print, dimensions in inches (same for both 3V and 5V)

Last updated on Sep 13, 2016 Published on Aug 20, 2014