It would be nice to support more than the 2 channels of igniter control
included in the stock [TeleMetrum](../TeleMetrum/) design, so that we can
fly more complex projects involving staging, air starts, and backup ejection
-charges.
+charges. We also want to experiment with better circuits for testing igniter
+continuity, with the hope of being able to measure actual resistance and not
+just continuity.
## Features ##
### User View ###
* Small circuit board mounted near [TeleMetrum](../TeleMetrum/)
-* Requires rework of [TeleMetrum](../TeleMetrum/) to replace onboard igniter
-channels with cable providing access to LiPo power and implementing
-I2C protocol.
+* Requires [TeleMetrum](../TeleMetrum/) v0.2, as v0.1 does not have the
+ required companion board interface
* Connections for 8 distinct igniter firing channels provided
* Supports use of separate battery for ejection charges
* [Microchip 16F886](http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en530146) Microcontroller
* 8k Flash
* 386 bytes RAM
- * I2C target interface
+ * SPI target interface
* In-circuit programming interface
* Software Features (planned)
* Written in PIC assembler
* The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
* The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
-## Problems ##
-
-* Since we didn't anticipate this design, [TeleMetrum](../TeleMetrum/) needs
-minor rework to interface with this board.
-
## Artifacts ##
-As of 11 April 2009, an incomplete schematic exists, but nothing is
-published yet.
+A schematic exists on [git.gag.com](http://git.gag.com) in the project
+[hw/telepyro](http://git.gag.com/?p=hw/telepyro;a=summary),
+but no prototypes have been built yet.