--- /dev/null
+# TeleMega History
+
+The only changes between v1 and v2 of TeleMega are that the SOC pin assignments
+for the companion port were adjusted to match improvements made during the
+design of EasyMega, the unused serial port connector was replaced with a
+connector for attaching 4 RC-style servos, and we upgraded from the CC1120
+to the CC1200 radio part from TI.
+
+## Version 1.0 ##
+
+These are photos of version 1.0:
+
+<a href="v1.0/telemega-v1.0-top.jpg"> <img src="v1.0/telemega-v1.0-top-thumb.jpg"></a>
+<a href="v1.0/telemega-v1.0-bottom.jpg"> <img src="v1.0/telemega-v1.0-bottom-thumb.jpg"></a>
+
+### 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).
+* 70cm ham-band transceiver for telemetry downlink
+* 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, integrated GPS receiver
+* 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.
+* 3.25 x 1.25 inch board designed to fit inside 38mm airframe coupler tube
+
+### Developer View ###
+
+* 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
+ * [u-blox](http://www.u-blox.com/) MAX-7Q GPS receiver
+ * on-board TaoGlas passive patch antenna
+ * async serial interface
+ * 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 ###
+
+Here are pdf snapshots of the files for Production PCB version 1.0:
+
+* [schematic](v1.0/telemega-sch.pdf)
+* [pcb artwork](v1.0/telemega-pcb.pdf)
+* [bill of materials](v1.0/partslist.csv)
projects / web / altusmetrum / blobdiff