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 Production units are available now from the
11 [Garbee and Garbee](http://auric.gag.com) web store.
13 <img src="v0.2/cimg5556-small.jpg">
19 * 70cm ham-band transceiver for interaction with [TeleMetrum](../TeleMetrum/)
20 * programmed for 38k4 GFSK data rate with forward error correction
21 * USB interface for power, configuration, and data interface
22 * 4 pin Tyco MicroMaTch connector for debug and flash programming
23 * 8 pin Tyco MicroMaTch connector supports serial or SPI interface
24 * 1.1 x 1.1 inch 2-layer board, fits inexpensive Hammond 1551 plastic enclosure
26 ### Developer View ###
28 * [TI CC1111F32](http://focus.ti.com/docs/prod/folders/print/cc1111f32.html) Low Power RF System-on-Chip
29 * Sub-1Ghz transceiver
34 * 6 12-bit analog inputs (11 bits with single-ended sensors)
35 * 2 channels of serial I/O
37 * 100mA 3.3V LDO regulator
38 * takes input from USB interface by default
39 * output appears on 8-pin companion connector
40 * can take input from 8-pin companion connector in non-USB applications
42 * Written mostly in C with some 8051 assembler
43 * Runs from on-chip flash, uses on-chip RAM
44 * USB serial emulation for data interface
46 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
47 * [SDCC](http://sdcc.sourceforge.net/) compiler and source debugger
49 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
50 * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
52 ## [Production History](../production) ##
56 The hardware design current gEDA files are available from
57 [git.gag.com](http://git.gag.com) in the project
58 [hw/teledongle](http://git.gag.com/?p=hw/teledongle;a=summary).
60 For those who don't have ready access to the gEDA suite, here are pdf snapshots
61 of files in more easily readable form.
63 * [schematic](v0.2/teledongle.pdf)
64 * [pcb artwork](v0.2/teledongle.pcb.pdf)
65 * [bill of materials](v0.2/partslist.csv)
67 This board is an integral part of a [TeleMetrum](../TeleMetrum/) system, and
68 the firmware for both share common elements. More details, including full
69 source code and pre-built packages can be found on the
70 [AltOS](../AltOS) page on this site.
74 The current version 0.2 boards "just work", and are available for sale from the
75 [Garbee and Garbee](http://auric.gag.com) web store in either board-only or
78 Several people are working on firmware changes to use these boards as general
79 purpose RF interfaces for [Arduino](http://arduino.cc) and other
80 microcontroller systems.