Datasheet

The Pro Trinket PCB measures only 1.5" x 0.7" x 0.2" (without headers) but packs the same capability as an Arduino

UNO. So it's great once you've finished up a prototype on an official Arduino UNO and want to make the project

smaller.

The Pro Trinket 5V uses the Atmega328P chip, which is the same core chip in the Arduino UNO/Duemilanove/Mini/etc.

at the same speed and voltage. So you'll be happy to hear that not only is Pro Trinket programmable using the