This is a high-end recording dual-deploy altimeter for high power model
rocketry with integrated GPS and telemetry link. The features included
make TeleMega the ideal choice for complex projects including sustainers
-on multi-stage projects.
+on multi-stage projects. In particular, pyro events are configurable and
+can be based on time and various flight events and status, including angle
+from vertical.
For the latest TeleMega firmware and related ground station software, please
visit the [AltOS](../AltOS) page on this site.
These are photos of the first v0.1 prototype:
-<a href="v0.1/telemega-v0.1-top.jpg"> <img src="v0.1/telemega-v0.1-top-thumb.jpg"></a>
-<a href="v0.1/telemega-v0.1-bottom.jpg"> <img src="v0.1/telemega-v0.1-bottom-thumb.jpg"></a>
+<a href="v0.1/megametrum-v0.1-top.jpg"> <img src="v0.1/megametrum-v0.1-top-thumb.jpg"></a>
+<a href="v0.1/megametrum-v0.1-bottom.jpg"> <img src="v0.1/megametrum-v0.1-bottom-thumb.jpg"></a>
## Features ##
### User View ###
* Recording altimeter for high power model rocketry
-* Supports dual deployment and additional pyro events (can fire 6 charges)
+* Supports dual deployment and 4 additional pyro events.
+ Pyro events are
+ configurable and can be based on time and various flight events and status,
+ including angle from vertical (for safety in staging and air start flights).
* 70cm ham-band transceiver for telemetry downlink
* Barometric pressure sensor good to 100k feet MSL
* 1-axis 105-g accelerometer for motor characterization
### Developer View ###
-* Hardware Features of v0.1
+* Hardware Features of v0.3
* ST Micros [STM32L151](http://www.st.com/internet/mcu/product/248821.jsp) ARM Cortex M3 based Microcontroller
* TI [CC1120](http://www.ti.com/product/cc1120) High Performance RF Transceiver for Narrowband Systems
* 150mA 3.3V LDO regulator
* [Winbond W25Q64CV](http://www.winbond.com/hq/enu/ProductAndSales/ProductLines/FlashMemory/SerialFlash/W25Q64CV.htm) serial flash memory
- * [SkyTraq](http://www.skytraq.com.tw/) Venus634FLPx GPS receiver
+ * [u-blox](http://www.u-blox.com/) MAX-6Q GPS receiver
* on-board [Taoglas AP.17A.01](http://www.taoglas.com/antennas/GPS_Antennas/Internal_GPS_-_Active_Patch_Modules/)
single-stage active patch antenna
* U.FL connector with 3.3V DC can be re-purposed for optional external amplified antennas
* Wide range — 120kPa to 1kPa (approximately -1500m to 31000m)
* High precision — 2.4Pa resolution (approximately 20cm at sea level)
* Factory calibrated.
- * Freescale [MMA655x](http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MMA65xx&fsrch=1&sr=1) Single Axis SPI Intertial Sensor
- * +- 105g or 120g full-scale
+ * Freescale [MMA6555](http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MMA65xx&fsrch=1&sr=1) Single Axis SPI Intertial Sensor
+ * +- 105g full-scale
* on-chip 12-bit digitizer
* Invensense [MPU-6000](http://invensense.com/mems/gyro/mpu6050.html) Six-Axis MEMS Motion Tracking Device
* tri-axis angular rate sensor up to 2000 degrees/second
## Future Plans ##
-TeleMega v0.1 prototypes are working and flight testing is underway. This
-version was shown publicly at NARCON 2013.
+TeleMega v0.1 prototypes worked and were flown on a number of test
+flights. This version was shown publicly at NARCON 2013.
Several changes to the hardware to improve performance and reliability
resulted in a v0.2 prototype version, however feedback from conversations at
NARCON caused us to sort of "skip" doing much with this version.
-As of late March 2013, we're waiting for v0.3 raw circuit boards to come back
-from fab. These have an improved pyro control circuit and u-blox GPS
-receiver.
+Version 0.3 prototypes are built and working, with an improved pyro control
+circuit and u-blox GPS receiver.
-We hope to offer this product in time for the North American 2013
-flying season.
+The first test flight of v0.3 was on 19 May 2013, and the results look
+great! We plan more tests at [NSL 2013](http://nsl2013.org), and if all
+continues to go well, we hope to introduce this product in July, 2013.
projects / web / altusmetrum / blobdiff