1 [[!meta title="TelePyro"]]
4 This is an 8-channel pyro expansion board for [TeleMetrum](../TeleMetrum/).
6 <a href="v0.1/telepyro-top.jpg"> <img src="v0.1/telepyro-top-thumb.jpg"></a>
7 <a href="v0.1/telepyro-bottom.jpg"> <img src="v0.1/telepyro-bottom-thumb.jpg"></a>
11 It would be nice to support more than the 2 channels of igniter control
12 included in the stock [TeleMetrum](../TeleMetrum/) design, so that we can
13 fly more complex projects involving staging, air starts, and backup ejection
20 * Small circuit board mounted near [TeleMetrum](../TeleMetrum/)
21 * Requires [TeleMetrum](../TeleMetrum/) v0.2 or later, as v0.1 does not
22 have the required companion board interface
23 * Connections for 8 distinct igniter firing channels provided
24 * Supports use of separate battery for ejection charges
26 ### Developer View ###
29 * [Atmel ATmega32U4](http://www.atmel.com/dyn/products/product_card.asp?category_id=163&family_id=607&subfamily_id=760&part_id=4317) Microcontroller
31 * 2.5k + 832 bytes SRAM
33 * 12-channel 10-bit ADC
34 * SPI target interface
35 * USB interface which can be used for programming
36 * In-system programming interface
37 * Honeywell HMC5843 3-axis magnetic flux sensor
38 * Software Features (planned)
39 * programmed in C using gcc-avr
40 * Runs from on-chip flash, uses on-chip RAM
42 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
44 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
45 * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
49 A schematic and PC board design exist on [git.gag.com](http://git.gag.com)
50 in the project [hw/telepyro](http://git.gag.com/?p=hw/telepyro;a=summary),
51 but no prototypes have been built yet.
55 In late September 2011, v0.1 prototype boards were loaded and lightly
56 tested. They were never flown. The prototypes of TelePyro were lost in the
57 [Black Forest Fire](http://www.gag.com/blackforestfire.html), and have not
60 If we ever get back to this project, the first thing we'll want to do is toss
61 out the current design and start over, using an ARM Cortex SOC and our "new
62 pyro circuit" that completely prevents processor brown-out.