FRANS covered mechanical design, including the outline of the PCB and positioning of main hardware components at PCB. Next to that FRANS took care of realization of mechanical components and the final assembly.
Features that needed to be incorporated:
- Heart bead sensor (two green leds and a cameracell)
- Accelerometer
- Two infrared sensors
- Two infrared sources
- Bluetooth connection
- USB micro connector
- LED matrix display 11 x 11
- Two press knob switches
- Vibrate motor
- 21 test contacts to the outside
- Watertight to survive heavy rainfall
- Should fit a wide variety of wrist sizes
- The width of the band about 30 mm
- The thickness of the band locally max 15 mm
- Nice appearance