Osmo-nvs-gps » History » Version 7
laforge, 02/19/2016 10:48 PM
link to cgit to avoid outdated pdfs
| 1 | 3 | laforge | [[PageOutline]] |
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| 2 | 1 | laforge | = osmo-nvs-gps = |
| 3 | |||
| 4 | This is a small evaluation board for the NVS NV08C-CSM integrated GPS, Galileo and Glonass receiver. |
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| 6 | 5 | laforge | Like all Osmocom projects, it is fully open source, i.e. all schematics, layout files, etc. are released |
| 7 | publicly. |
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| 8 | |||
| 9 | 1 | laforge | It provides access to the two UARTS as well as SPI and I2C interface of the module, optional backup |
| 10 | 2 | laforge | battery for avoiding cold-start on power-loss and a MCX socket for connecting the antenna. |
| 11 | |||
| 12 | 1 | laforge | [[Image(osmo-nvs-gps.jpg, 50%)]] |
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| 14 | 5 | laforge | === Schematics and component placement === |
| 15 | 1 | laforge | |
| 16 | 5 | laforge | The schematics and layout source files are available from the git repository which can be browsed at http://cgit.osmocom.org/cgit/osmo-nvs-gps/ |
| 17 | 3 | laforge | |
| 18 | 7 | laforge | PDF rendering of schematics and component placement files can be found at |
| 19 | http://git.osmocom.org/osmo-nvs-gps/plain/hardware/nvs_gps_schem.pdf and http://git.osmocom.org/osmo-nvs-gps/plain/hardware/nvs_gps_board.pdf, respectively |
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| 20 | 3 | laforge | |
| 21 | 5 | laforge | === Part numbers === |
| 22 | 3 | laforge | |
| 23 | All capacitors, inductors and resistors are 0603 footprint, with the exception of C1 (0402). |
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| 24 | 1 | laforge | |
| 25 | 3 | laforge | * MCX socket is a Tyco Electronics 1-1337581-0 |
| 26 | * CR2032 battery holder is a MPD BA-2032 |
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| 27 | 4 | laforge | * The 2.5mm jacks are SJ-2523-SMT |
| 28 | 3 | laforge | |
| 29 | 5 | laforge | === Jumpers === |
| 30 | 1 | laforge | |
| 31 | * J1 connects VBAT with VCC, i.e. should ''only'' be placed if you ''do not have a battery attached'' |
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| 32 | * 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 |
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| 33 | * JP4 is the power supply connector. Apply 3.8..6V regulated DC power to it. Center pin is positive, outer pins both GND |
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| 34 | 5 | laforge | |
| 35 | == Where to buy == |
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| 37 | As this is an open source hardware design, you can just have the PCB manufactured, buy all the components and build it yourself. |
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| 38 | |||
| 39 | However, for your convenience, complete DYI kits are available from the [http://shop.sysmocom.de/products/osmo-nvs-eval sysmocom webshop]. |
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| 41 | == Who == |
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| 42 | |||
| 43 | 6 | ahuemer | osmo-nvs-gps was designed and developed by Harald Welte. Funding for prototypes by sysmocom. |
