Project description

F*watch is a fully open electronic watch project featuring an integrated GPS receiver.
The development started at CERN as an after-work project to make a special present for a retiring colleague who likes hiking and timing.
The full design (electronics, mechanics and software) is available under free licenses and the design is exclusively made with free tools.

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Specifications

Electronics

• Sensors
  • GPS
  • Pressure sensor
  • 3D-accelerometer
  • Compass
  • Ambient light sensor
• I/O
  • 128×128 pixels LCD with backlight
  • Micro-USB connector, 4 Buttons
  • Buzzer, vibrating motor
  • MicroSD memory slot
• Various
  • 500 mAh Lithium-ion battery, fuel gauge
  • 4-layer PCB
• Developed with open KiCad design tool for schematics and PCB
• Block diagram

Mechanics

• 3D-printed watch case and buttons
• Developed with open FreeCAD design tool

Software

• FreeRTOS operating system
• Bootloader, drivers, applications
• Interface to USB host (e.g. download track data, upload firmware)
• Developed with open gcc compiler

For more detail: F*watch – a fully open electronic watch