|
# Project description
|
|
# Project description
|
|
|
|
|
|
*Freewatch is a fully open electronic watch project featuring an
|
|
*Freewatch* is a fully open electronic watch project featuring an
|
|
integrated GPS.**
|
|
integrated GPS.**
|
|
The project was started at CERN to make a special present for a retiring
|
|
The project was started at CERN to make a special present for a retiring
|
|
colleague who likes hiking and timing.
|
|
colleague who likes hiking and timing.
|
... | @@ -13,17 +13,42 @@ To be informed of the latest developments, please register to the |
... | @@ -13,17 +13,42 @@ To be informed of the latest developments, please register to the |
|
list](https://www.ohwr.org/mailing_list/show?project_id=freewatch).
|
|
list](https://www.ohwr.org/mailing_list/show?project_id=freewatch).
|
|
|
|
|
|
[![](/uploads/7ed3be0060c0fdafff6a31ac6d720213/20140804_123913.jpg)](/uploads/7ed3be0060c0fdafff6a31ac6d720213/20140804_123913.jpg)
|
|
[![](/uploads/7ed3be0060c0fdafff6a31ac6d720213/20140804_123913.jpg)](/uploads/7ed3be0060c0fdafff6a31ac6d720213/20140804_123913.jpg)
|
|
*Freewatch first prototype** - [block
|
|
*Freewatch first prototype** - [inner
|
|
diagram](https://www.ohwr.org/3342) -
|
|
view](https://www.ohwr.org/project/f-watch/uploads/5e63e30379a887300141908da54c8073/IMG_0258.JPG) - [block
|
|
[inside](https://www.ohwr.org/project/f-watch/uploads/5e63e30379a887300141908da54c8073/IMG_0258.JPG)
|
|
diagram](https://www.ohwr.org/3342)
|
|
|
|
|
|
-----
|
|
-----
|
|
|
|
|
|
## Specifications
|
|
## Specifications
|
|
|
|
|
|
- Electronics: PCB, including battery and power management strategy
|
|
*Electronics**
|
|
- Mechanics: watch case, buttons, USB cap
|
|
|
|
- Software. Bootloader, drivers, applications, interface to USB host
|
|
- 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
|
|
|
|
|
|
-----
|
|
-----
|
|
|
|
|
... | @@ -92,6 +117,14 @@ diagram](https://www.ohwr.org/3342) - |
... | @@ -92,6 +117,14 @@ diagram](https://www.ohwr.org/3342) - |
|
<td>16-07-2014</td>
|
|
<td>16-07-2014</td>
|
|
<td>First board mounted, MCU is accessible with debugger, found a bug in TPS780180300 datasheet.</td>
|
|
<td>First board mounted, MCU is accessible with debugger, found a bug in TPS780180300 datasheet.</td>
|
|
</tr>
|
|
</tr>
|
|
|
|
<tr class="odd">
|
|
|
|
<td>03-08-2014</td>
|
|
|
|
<td>Pressure sensor reading and display works.</td>
|
|
|
|
</tr>
|
|
|
|
<tr class="even">
|
|
|
|
<td>04-08-2014</td>
|
|
|
|
<td>3D printed case received. Everything fits.</td>
|
|
|
|
</tr>
|
|
</tbody>
|
|
</tbody>
|
|
</table>
|
|
</table>
|
|
|
|
|
... | | ... | |