+[[!meta title="MicroPeak"]]
+<img src="../logos/micropeak-oneline.svg" height="100"/>
-[[!inline pages="./releases/* and !*/Discussion and !*.html and !*.bz2 and !*.zip and !*.exe" show="10" rss="no" raw="yes" ]]
+# Introducing MicroPeak by AltusMetrum #
+Micropeak is a barometric logging altimeter for precision model
+rocketry altitude measurements.
+
+<a href="v1.0/micropeak-dime.jpg"><img src="v1.0/micropeak-dime-640.jpg"></a>
+
+Production units are available from the
+[Garbee and Garbee](http://auric.gag.com/index.php?route=product/product&product_id=80)
+web store and [Apogee Components](http://www.apogeerockets.com/Electronics_Payloads/Altimeters/MicroPeak_Altimeter)
+
+Data download is available using the [MicroPeak USB adapter](../MicroPeakUSB).
+
+## Documentation ##
+
+The MicroPeak manual is available in
+[html](../AltOS/doc/micropeak.html) and
+[pdf](../AltOS/doc/micropeak.pdf) formats.
+
+## Software ##
+
+The MicroPeak application runs on Linux, Mac OS X and Windows. It
+communicates with the [MicroPeak USB adapter](../MicroPeakUSB) to download and analyze
+flight data. It's written in [Java](http://java.com) and offers the
+same functionality and interface on all three platforms. It uses the
+FTDI USB Serial drivers to communicate with the hardware. If you're
+running Mac OS X or Windows, a compatible version of those drivers is
+included with the software. You can also install a different from from
+the [FTDI Driver](http://www.ftdichip.com/FTDrivers.htm) page.
+
+## Hardware Features ##
+
+ * Measure ground pressure and peak altitude pressure.
+ * Logs 48 seconds of flight data
+ * Orange LED blinks out maximum height in decimeters.
+ * 18mm x 14mm. 1.9g including battery.
+ * Power switch.
+
+The CR1025 battery holder is mounted on the back side of the board, so there are no external wires or batteries to manage.
+
+## Software features ##
+
+ * Saves last flight data to non-volatile memory.
+ * Reports previous flight on power-on.
+ * Automatically shuts down on landing to preserve battery.
+
+## Battery Holder ##
+
+MicroPeak includes an integrated battery holder on the back side of
+the circuit board.
+
+<a href="v1.0/micropeak-back.jpg"><img
+src="v1.0/micropeak-back-640.jpg"></a>
+
+## Developer View ##
+
+Here's a close-up view of the hardware
+
+<a href="v1.0/micropeak.jpg"><img src="v1.0/micropeak-640.jpg"></a>
+
+ * Hardware Features
+ * [ATMEL ATtiny85](http://www.atmel.com/devices/attiny85.aspx) Microcontroller
+ * 8K flash
+ * 512B RAM
+ * 512B EEPROM
+ * SPI/I2C 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.
+ * CR1025 Lithium Battery
+ * 30mAh. Runs MicroPeak for more than 40 hours on the pad or in flight
+ * [OSRAM LO T67K](http://catalog.osram-os.com/catalogue/catalogue.do?favOid=000000000002269f00090023&act=showBookmark) orange LED
+ * Standard 6-pin AVR programming interface.
+
+ * Software Features
+ * Written in C
+ * Samples pressure every 96ms
+ * Delay 30s after power-on to finish airframe prep
+ * Detect boost with 10m altitude change
+ * Exponential averaging filter to minimize transient effects.
+
+ * Tools Used
+ * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
+ * [GCC](http://gcc.gnu.org) as an AVR cross-compiler
+
+ * 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)
+
+<center><img src="../logos/micropeak.svg" height="64"/>
projects / web / altusmetrum / commitdiff