The Accessory Development Kit (ADK) is a reference implementation for hardware manufacturers and hobbyists to use as a starting point for building accessories for Android. Each ADK release is provided with source code and hardware specifications to make the process of developing your own accessories easier. Creating new and alternative hardware based on the ADK is encouraged!
The materials used in making the watch are Electronics 1 Arduino Mini Pro 328 - 3.3V/8MHz available at SparkFun 1 FTDI Basic Breakout (if you don't have one) available at SparkFun 1 4D Systems OLED Module 1.5" (128x128 pixels) available at SparkFun 1 Blackberry Trackballer Breakout available at SparkFun (I'm sensing a theme of the supplier) 1 3.7V 1000mAh Li-Polymer battery available at SparkFun 1 LiPoly Fast Charger available at SparkFun 1 DS1307 Real-time clock available at Digi-Key 1 Crystal 32kHz available at SparkFun Nuts and Bolts available at local hardware stores 2 #4 bolts 3/8" long 2 #4 bolts 1/4" long 4 #4 bolts 3/4" long 8 #4 nuts (for the nuts and bolts I found the brass ones at Ace and the zinc ones at Home Depot)
Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments.
BOSSA is a flash programming utility for Atmel's SAM family of flash-based ARM microcontrollers. The motivation behind BOSSA is to create a simple, easy-to-use, open source utility to replace Atmel's SAM-BA software. BOSSA is an acronym for asic pen ource AM-BA pplication to reflect that goal.