3 This is an 8-channel pyro expansion board for [TeleMetrum](../TeleMetrum/).
7 It would be nice to support more than the 2 channels of igniter control
8 included in the stock [TeleMetrum](../TeleMetrum/) design, so that we can
9 fly more complex projects involving staging, air starts, and backup ejection
10 charges. We also want to experiment with better circuits for testing igniter
11 continuity, with the hope of being able to measure actual resistance and not
18 * Small circuit board mounted near [TeleMetrum](../TeleMetrum/)
19 * Requires [TeleMetrum](../TeleMetrum/) v0.2, as v0.1 does not have the
20 required companion board interface
21 * Connections for 8 distinct igniter firing channels provided
22 * Supports use of separate battery for ejection charges
24 ### Developer View ###
26 * [Microchip 16F886](http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en530146) Microcontroller
29 * SPI target interface
30 * In-circuit programming interface
31 * Software Features (planned)
32 * Written in PIC assembler
33 * Runs from on-chip flash, uses on-chip RAM
35 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
37 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
38 * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
42 A schematic exists on [git.gag.com](http://git.gag.com) in the project
43 [hw/telepyro](http://git.gag.com/?p=hw/telepyro;a=summary),
44 but no prototypes have been built yet.