Osmo-nvs-gps » History » Version 10
laforge, 07/25/2022 08:56 AM
| 1 | 8 | laforge | {{>toc}} |
|---|---|---|---|
| 2 | 1 | laforge | |
| 3 | 8 | laforge | h1. osmo-nvs-gps |
| 4 | |||
| 5 | |||
| 6 | 1 | laforge | This is a small evaluation board for the NVS NV08C-CSM integrated GPS, Galileo and Glonass receiver. |
| 7 | |||
| 8 | 5 | laforge | Like all Osmocom projects, it is fully open source, i.e. all schematics, layout files, etc. are released |
| 9 | publicly. |
||
| 10 | |||
| 11 | 1 | laforge | It provides access to the two UARTS as well as SPI and I2C interface of the module, optional backup |
| 12 | 2 | laforge | battery for avoiding cold-start on power-loss and a MCX socket for connecting the antenna. |
| 13 | 1 | laforge | |
| 14 | 9 | laforge | !{width:50%}osmo-nvs-gps.jpg! |
| 15 | 1 | laforge | |
| 16 | |||
| 17 | 8 | laforge | h3. Schematics and component placement |
| 18 | |||
| 19 | |||
| 20 | 10 | laforge | The schematics and layout source files are available from the git repository which can be browsed at https://gitea.osmocom.org/electronics/osmo-small-hardware/src/branch/master/osmo-nvs-gps |
| 21 | 1 | laforge | |
| 22 | 10 | laforge | PDF rendering of schematics and component placement files can be found at https://gitea.osmocom.org/electronics/osmo-small-hardware/src/branch/master/osmo-nvs-gps/nvs_gps_schem.pdf and https://gitea.osmocom.org/electronics/osmo-small-hardware/src/branch/master/osmo-nvs-gps/nvs_gps_board.pdf, respectively |
| 23 | 1 | laforge | |
| 24 | |||
| 25 | 8 | laforge | h3. Part numbers |
| 26 | |||
| 27 | |||
| 28 | 1 | laforge | All capacitors, inductors and resistors are 0603 footprint, with the exception of C1 (0402). |
| 29 | |||
| 30 | 8 | laforge | * MCX socket is a Tyco Electronics 1-1337581-0 |
| 31 | * CR2032 battery holder is a MPD BA-2032 |
||
| 32 | * The 2.5mm jacks are SJ-2523-SMT |
||
| 33 | 1 | laforge | |
| 34 | 5 | laforge | |
| 35 | 8 | laforge | h3. Jumpers |
| 36 | 1 | laforge | |
| 37 | |||
| 38 | 8 | laforge | * J1 connects VBAT with VCC, i.e. should _only_ be placed if you _do not have a battery attached_ |
| 39 | * J1 connects VIO with VCC. This is the case when VIO (Voltage for digital i/o) is _not provided by an external circuit attached to X2 |
||
| 40 | * JP4 is the power supply connector. Apply 3.8..6V regulated DC power to it. Center pin is positive, outer pins both GND |
||
| 41 | |||
| 42 | |||
| 43 | h2. Where to buy |
||
| 44 | |||
| 45 | |||
| 46 | 5 | laforge | As this is an open source hardware design, you can just have the PCB manufactured, buy all the components and build it yourself. |
| 47 | |||
| 48 | 8 | laforge | However, for your convenience, complete DYI kits are available from the "sysmocom webshop":http://shop.sysmocom.de/products/osmo-nvs-eval. |
| 49 | 5 | laforge | |
| 50 | 8 | laforge | |
| 51 | h2. Who |
||
| 52 | |||
| 53 | 1 | laforge | |
| 54 | osmo-nvs-gps was designed and developed by Harald Welte. Funding for prototypes by sysmocom. |
