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
16 * Small circuit board mounted near [TeleMetrum](../TeleMetrum/)
17 * Requires rework of [TeleMetrum](../TeleMetrum/) to replace onboard igniter
18 channels with cable providing access to LiPo power and implementing
20 * Connections for 8 distinct igniter firing channels provided
21 * Supports use of separate battery for ejection charges
23 ### Developer View ###
25 * [Microchip 16F882](http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en530146) Microcontroller
28 * I2C target interface
29 * In-circuit programming interface
30 * Software Features (planned)
31 * Written in PIC assembler
32 * Runs from on-chip flash, uses on-chip RAM
34 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
36 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
37 * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
41 * Since we didn't anticipate this design, [TeleMetrum](../TeleMetrum/) needs
42 minor rework to interface with this board.
46 As of 11 April 2009, an incomplete schematic exists, but nothing is