+[[!meta title="EasyMega"]]
# EasyMega
This is a high-end recording dual-deploy altimeter for high power model
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.
+version 1.4.2 or later.
-I'll add photos of the prototypes soon.
+Here are photos of version 1.0 (we may get around to taking picutres of 2.0
+eventually, but it looks substantially similar):
-<a href="v0.1/easymega-v0.1-top.jpg"> <img src="v0.1/easymega-v0.1-top-thumb.jpg"></a>
-<a href="v0.1/easymega-v0.1-bottom.jpg"> <img src="v0.1/easymega-v0.1-bottom-thumb.jpg"></a>
+<a href="v1.0/easymega-v1.0-top.jpg"> <img src="v1.0/easymega-v1.0-top-thumb.jpg"></a>
+<a href="v1.0/easymega-v1.0-bottom.jpg"> <img src="v1.0/easymega-v1.0-bottom-thumb.jpg"></a>
## Features ##
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 200-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
+* Can drive up to 4 RC-style servos
* 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
* 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
+ * Analog Devices [ADXL375](https://www.analog.com/en/products/adxl375.html) 3-Axis Digital MEMS Accelerometer
+ * +- 200g full-scale
+ * on-chip digitizer
+ * Invensense [MPU-9250](http://invensense.com/mems/gyro/mpu9250.html) Nine-Axis MEMS Motion Tracking Device
* tri-axis angular rate sensor up to 2000 degrees/second
* tri-axis accelerometer with +- 16g range
+ * tri-axis magnetic (compass) sensor
* 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
+ * [Lepton EDA](https://github.com/lepton-eda/) for schematic capture
+ and [pcb-rnd](http://repo.hu/projects/pcb-rnd/) for 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)
which is available in [html](../AltOS/doc/altusmetrum.html) and
[pdf](../AltOS/doc/altusmetrum.pdf) formats.
+An outline of the board with drill hole locations is available in
+[pdf](../AltOS/doc//easymega-outline.pdf) format.
+
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 ##
+For those who don't have ready access to the gEDA suite, here are pdf snapshots
+of the files for Production PCB version 5.0 in more easily readable form:
+
+* [schematic](v2.0/easymega-sch.pdf)
+* [pcb artwork](v2.0/easymega-pcb.pdf)
+* [bill of materials](v2.0/partslist.csv)
+
+## [History of EasyMega](history) ##
+
+## Status ##
-Version 0.1 prototypes are built and seem to work. After some flight testing,
-we'll decide if and when this goes to production.
+Version 2.0 production units are now available for sale.
projects / web / altusmetrum / blobdiff