Requirements
- Record Spins locally on device
- Be able to record multi hour spin sessions
- Have several day usage battery life
- Communicate to mobile device over bluetooth
- Application that can display spins over time visually
Block Diagram

Threshold time for spin specified by user with a reasonable default. All “spin” events include threshold time that was used.
There is also a possibility to record ½ spins or ¼ spins.
Prototype Schematic

Case design sketch

Timeline
Timeline Powerpoint viewer