3 This is an 8-channel pyro expansion board for [TeleMetrum](../TeleMetrum/).
5 <a href="v0.1/telepyro-top.jpg"> <img src="v0.1/telepyro-top-thumb.jpg"></a>
6 <a href="v0.1/telepyro-bottom.jpg"> <img src="v0.1/telepyro-bottom-thumb.jpg"></a>
10 It would be nice to support more than the 2 channels of igniter control
11 included in the stock [TeleMetrum](../TeleMetrum/) design, so that we can
12 fly more complex projects involving staging, air starts, and backup ejection
19 * Small circuit board mounted near [TeleMetrum](../TeleMetrum/)
20 * Requires [TeleMetrum](../TeleMetrum/) v0.2 or later, as v0.1 does not
21 have the required companion board interface
22 * Connections for 8 distinct igniter firing channels provided
23 * Supports use of separate battery for ejection charges
25 ### Developer View ###
28 * [Atmel ATmega32U4](http://www.atmel.com/dyn/products/product_card.asp?category_id=163&family_id=607&subfamily_id=760&part_id=4317) Microcontroller
30 * 2.5k + 832 bytes SRAM
32 * 12-channel 10-bit ADC
33 * SPI target interface
34 * USB interface which can be used for programming
35 * In-system programming interface
36 * Honeywell HMC5843 3-axis magnetic flux sensor
37 * Software Features (planned)
38 * programmed in C using gcc-avr
39 * Runs from on-chip flash, uses on-chip RAM
41 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
43 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
44 * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
48 A schematic and PC board design exist on [git.gag.com](http://git.gag.com)
49 in the project [hw/telepyro](http://git.gag.com/?p=hw/telepyro;a=summary),
50 but no prototypes have been built yet.
54 As of late September 2011, v0.1 prototype boards are loaded and under test.
56 Most prototypes of TelePyro were lost in the
57 [Black Forest Fire](http://www.gag.com/blackforestfire.html),
58 we hope to get back to this project someday.