3 This is an RF interface designed primarily for use as a ground station
4 interacting with a [TeleMetrum](../TeleMetrum/) altimeter on board a high
5 power model rocket. The primary computer interface is USB, but async serial
6 and SPI are also available as alternatives. The RF filter components are
7 by default set for use in the vicinity of 435 Mhz, but can be altered to
8 support other frequency ranges.
10 <img src="v0.2/cimg5556-small.jpg">
16 * 70cm ham-band transceiver for interaction with [TeleMetrum](../TeleMetrum/)
17 * USB interface for power, configuration, and data interface
18 * 4 pin Tyco MicroMaTch connector for debug and flash programming
19 * 8 pin Tyco MicroMaTch connector supports serial or SPI interface
20 * 1.1 x 1.1 inch 2-layer board, fits inexpensive Hammond 1551 plastic enclosure
22 ### Developer View ###
24 * [TI CC1111F32](http://focus.ti.com/docs/prod/folders/print/cc1111f32.html) Low Power RF System-on-Chip
25 * Sub-1Ghz transceiver
30 * 6 12-bit analog inputs (11 bits with single-ended sensors)
31 * 2 channels of serial I/O
33 * 100mA 3.3V LDO regulator
34 * takes input from USB interface by default
35 * output appears on 8-pin companion connector
36 * can take input from 8-pin companion connector in non-USB applications
38 * Written mostly in C with some 8051 assembler
39 * Runs from on-chip flash, uses on-chip RAM
40 * USB serial emulation for data interface
42 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
43 * [SDCC](http://sdcc.sourceforge.net/) compiler and source debugger
45 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
46 * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
48 ## [Production History](../production) ##
52 The hardware design current gEDA files are available from
53 [git.gag.com](http://git.gag.com) in the project
54 [hw/teledongle](http://git.gag.com/?p=hw/teledongle;a=summary).
56 For those who don't have ready access to the gEDA suite, here are pdf snapshots
57 of files in more easily readable form.
59 * [schematic](v0.2/teledongle.pdf)
60 * [pcb artwork](v0.2/teledongle.pcb.pdf)
61 * [bill of materials](v0.2/partslist.csv)
63 This board is an integral part of a [TeleMetrum](../TeleMetrum/) system, and
64 the firmware for both share common elements. More details, including full
65 source code and pre-built packages can be found on the
66 [AltOS](../AltOS) page on this site.
70 An initial batch of TeleDongle v0.2 boards are currently at our assembler. If
71 they work as expected, we hope to have TeleDongle for sale in early March 2010.