I've dabbled in Eagle before... usually making slight tweaks to already existing designs. I'm designing the bracelet PCB from scratch. The first design was.... lacking.
I knew the first design would be large, but not so large that it wouldn't easily fit on a wrist. There are a few reasons for the size:
- I'm using larger SMT and Through Hole components, because I planned to solder everything by hand.
- I did a really poor job arranging the components on the board
- I have a number of large programming pins
I'm in the process of creating a second design - where I'm planning to reduce the size of the components and switch to SMT for most cases. I'm also going to revisit my programming headers.
I might start with one of the Adafruit Trinkets as a starting point... at least some of the components (Cortex M0, Caps, and Voltage Reg) are already laid out.