theory made it possible for pyro charges to fire at power on. We never saw
a problem, but the change was easy and obvious.
+## v2.0 ##
+
+<a href="v2.0/telemetrum-v2.0-th.jpg"> <img src="v2.0/telemetrum-v2.0-th-thumb.j
+pg"></a>
+<a href="v2.0/telemetrum-v2.0-smt.jpg"> <img src="v2.0/telemetrum-v2.0-smt-thumb
+.jpg"></a>
+
+Prototypes of v2.0 were first flown at Airfest 2013, and v2.0 was sold through
+fall of 2019.
+
+Compared with the v1 series, v2 includes a better GPS (uBlox vs
+Skytraq), higher power radio (40mW instead of 10mW), wider range and
+more precise pressure sensor (100k' MSL vs 45k' MSL), larger on-board
+storage (8MB vs 2MB), more precise, wider range accelerometer (12 bits
+instead of 10 bits, 105g instead of 70g) and faster processor (32-bit ARM
+Cortex M3 instead of 8-bit 8051).
+
+### User View ###
+
+* Recording altimeter for model rocketry
+* Supports dual deployment (can fire 2 ejection charges)
+* 70cm ham-band transceiver for telemetry downlink
+* Barometric pressure sensor good to 100k feet MSL
+* 1-axis 105-g accelerometer for motor characterization
+* 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
+* Uses LiPo to fire e-matches, can be made to support separate pyro battery
+* 2.75 x 1 inch board designed to fit inside 29mm airframe coupler tube
+
+
+### Developer View ###
+
+* Hardware Features of v2.0
+ * 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 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
+* 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)
+
projects / web / altusmetrum / blobdiff