We are proud to announce you that the final version of the hardware has been finished and is fully working. It is based on the same hardware as the first prototype and work flawlessly.
The following main hardware is used:
- EM408 SirfIII 20 Channels GPS Module from USGlobalSat. (You can buy it from Sparkfun or directly from USGlobalSat)
- Microchip PIC18F25J10 clocked at 20Mhz. (Available here)
All other parts are standard (with the exception of the dock connector which you can buy from Ridax).
As told in the last post, the overall system seek the following:
| Mode | Current |
| GPS Not activated | 5 mA |
| GPS in satellites lockup mode | 85 mA |
| GPS in tracking mode | 75 mA |
As we can see, when the GPS module is disabled, it doesn’t seek any current (5 mA is really nothing…). We haven’t done any battery life test now but it should not decrease a lot the iPhone / iPod autonomy.
We provide the full schematic and the PCB used to built the xGPS module.
- xGPS Module schematic
- xGPS Module PCB – All Layouts and xGPS Module PCB – Only the TOP and BOTTOM layers
We are proposing to sell these GPS module for the iPhone / iPod touch if there are many demands. If you are interested, feel free to contact us here: http://www.xwaves.net/?inc=contact.
We are now focusing our work on the software side of the project to be able to use the GPS without any Internet connection.
