Project description
Freewatch is a fully open electronic watch project featuring an
integrated GPS.**
The project was started at CERN to make a special present for a retiring
colleague who likes hiking and timing.
The full design (electronics, mechanics and software) is available under
open licenses and, what's more, the design is exclusively made with open
tools.
To be informed of the latest developments, please register to the mailing list.
Freewatch first prototype* - inner
view - block
diagram
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
- MicroSD memory slot
- Various
- 500 mAh Lithium-ion battery, fuel gauge
- 4-layer PCB
- Developed with KiCad design tool for schematics and PCB
Mechanics*
- 3D-printed watch case and buttons
- Developed with FreeCAD design tool
Software*
- FreeRTOS operating system
- Bootloader, drivers, applications
- Interface to USB host (e.g. download track data, upload firmware)
- Developed with gcc compiler
Project documents
- Components selection
- Electronics design
- Mechanical design
- Software
- Tutorials for development tools
- Host side
- Frequently Asked Questions
- Other interesting projects
- The Movie
Releases
Contacts
- 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 August 2014