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.

To be informed of the latest developments, and participate in the discussions, please subscribe to the mailing list.


Version 1 (click picture to enlarge)


Specifications

Electronics
  • Sensors
    • GPS
    • Pressure sensor
    • 3D-accelerometer
    • Compass
    • Ambient light sensor
  • I/O
    • 128x128 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

Project documents


F*watch team

  • Project management: Javier
  • Electronics: Matthieu †, Tom, Eva, Thedi, Keith
  • Mechanics: Javier, David, Maciej
  • Software: Andrzej, Orson, Greg, Thedi, Federico, Xavier
  • "Making of" movie: Maciej
  • OHR site management: Erik


Status

Date Event
28-04-2014 Idea for a special present for retiring colleague coined by Javier.
09-05-2014 First meeting. Main features and task forces defined. Aim to have a prototype by September.
16-05-2014 Main components chosen. ComponentSelection.
27-05-2014 Schematics draft ready for review.
03-06-2014 Board almost fully routed.
15-07-2014 Prototype PCB received.
16-07-2014 First board mounted, MCU is accessible with debugger, found a bug in TPS780180300 datasheet.
03-08-2014 Pressure sensor reading and display works.
04-08-2014 3D printed case received. Everything fits.
14-08-2014 Hackathon at CERN.
22-08-2014 Case V3 prototype received, 3D printed in resin.
25-08-2014 First GPS lock!
08-10-2014 F*watch given to the retiring colleague at his goodbye party.
24-10-2014 Designing better housing, with bug fixes and better fastening of the two housing parts.
11-02-2015 Interest shown to improve design with Bluetooth so it can be used as a health monitoring hub.

28 July 2015