Smart watches are becoming increasingly popular. Large tech companies have been trying to design and build watches that are self contained units. They have their own GPS, and accelerometers, buzzers, and big color screens. With all these sensors and outputs, and a powerful enough chip to run them all; battery life is usualy sub-par. Weight and cost also become issues. I am designing a watch that acts less as a seperate unit, and uses the phone's sensors and processor for as much of the work as possible. The plan is to use a simple memory LCD screen like the one used in the Pebble smart watch, and Bluetooth LE, together with a large battery to keep the watch powered for a long time.
Components
1×
Adafruit Pro Trinket
Tiny breakout for the ATmega328. Compatible with Arduino. 3v version.
1×
Adafruit Pro Trinket LiPoly Backpack Add-On
Battery charging cuircut that solders directly to the Pro Trinket's headers.
1×
Lithium Ion Polymer Battery
3.7v 500mAh. Sourced from Adafruit.
1×
Bluefruit LE Breakout
Breakout board for the nRF8001 Bluetooth LE chip. Includes antenna. Also from Adafruit
1×
SHARP Memory Display Breakout
1.3" 96x96 Silver Monochrome Display. Only uses energy when written to. Need 2k ram to buffer screen. Again, from Adafruit.
I hope to start work on this project soon, I just need to get the cash together first.
All the components are off the shelf, and from the same place, so hopefully It will be simple to set up a prototype right away. I'm new to hardware hacking, and want to set up and dive into coding the software (firmware?). Later, when the prototype is working well, it should be easy enough to source the same componets for a custom PCB and enclosure, and use the same code.