From 88bb90f62550fd4beef20a4d43a4d0f04ffc86a9 Mon Sep 17 00:00:00 2001 From: Bdale Garbee Date: Fri, 16 May 2014 09:39:45 -0600 Subject: [PATCH] of course, including the actual EasyMega content might help... --- EasyMega/index.mdwn | 82 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 EasyMega/index.mdwn diff --git a/EasyMega/index.mdwn b/EasyMega/index.mdwn new file mode 100644 index 0000000..fba47fc --- /dev/null +++ b/EasyMega/index.mdwn @@ -0,0 +1,82 @@ +# EasyMega + +This is a high-end recording dual-deploy altimeter for high power model +rocketry. The feature set is identical to [TeleMega](../TeleMega), but +without the integrated GPS and telemetry link. This makes EasyMega an +ideal choice for complex projects including sustainers on multi-stage +projects where integrated radio functionality isn't needed. 4 of the 6 +pyro events are configurable and can be based on time and various flight +events and status, including angle from vertical. + +For the latest EasyMega firmware and related ground station software, please +visit the [AltOS](../AltOS) page on this site. EasyMega requires AltOS +version 1.3.3 or later. + +I'll add photos of the prototypes soon. + + + + +## Features ## + +### User View ### + +* Recording altimeter for high power model rocketry +* 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). +* Barometric pressure sensor good to 100k feet MSL +* 1-axis 105-g accelerometer for motor characterization +* 3-axis 16-g accelerometer for gyro calibration +* 3-axis 2000 deg/sec gyros +* 3-axis magnetic sensor +* On-board non-volatile memory for flight data storage +* USB for power, configuration, and data recovery +* Integrated support for LiPo rechargeable batteries +* User choice of pyro battery configuration, can use primary LiPo or any + customer-chosen separate pyro battery up to 12 volts nominal. +* 2.25 x 1.25 inch board designed to fit inside 38mm airframe coupler tube + +### Developer View ### + +* Hardware Features + * ST Micros [STM32L151](http://www.st.com/internet/mcu/product/248821.jsp) ARM Cortex M3 based Microcontroller + * 150mA 3.3V LDO regulator + * [Winbond W25Q64CV](http://www.winbond.com/hq/enu/ProductAndSales/ProductLines/FlashMemory/SerialFlash/W25Q64CV.htm) serial flash memory + * Measurement Specialties [MS5607](http://www.meas-spec.com/product/t_product.aspx?id=8499) Micro Altimeter Module + * Wide range — 120kPa to 1kPa (approximately -1500m to 31000m) + * High precision — 2.4Pa resolution (approximately 20cm at sea level) + * Factory calibrated. + * 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 + * tri-axis accelerometer with +- 16g range + * three on-chip ADCs for true simultaneous sampling of all axes + * Honeywell HMC5883L 3-axis magnetic (compass) sensor +* Software Features + * Written mostly in C with some ARM assembler + * Runs from on-chip flash, uses on-chip RAM, stores flight data to serial flash + * USB serial emulation for "console" interface +* Tools Used + * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout +* Licenses + * 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) + +## Artifacts ## + +There is a single manual for EasyMega and most other Altus Metrum products, +which is available in [html](../AltOS/doc/altusmetrum.html) and +[pdf](../AltOS/doc/altusmetrum.pdf) formats. + +The hardware design current gEDA files are available from +[git.gag.com](http://git.gag.com) in the project +[hw/easymega](http://git.gag.com/?p=hw/easymega;a=summary). + +## Future Plans ## + +Version 0.1 prototypes are built and seem to work. After some flight testing, +we'll decide if and when this goes to production. -- 2.47.2