Add initial MicroPeak page (not linked yet)

Signed-off-by: Keith Packard <keithp@keithp.com>

5 files changed, 60 insertions, 0 deletions

diff --git a/MicroPeak/index.mdwn b/MicroPeak/index.mdwn
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+# MicroPeak
+
+This is a peak-recording barometric altimeter for precision model
+rocketry altitude measurements.
+
+<a href="v0.1/micropeak-dime.jpg"><img
+src="v0.1/micropeak-dime-640.jpg"></a>
+
+Production units will be available from the
+[Garbee and Garbee](http://auric.gag.com) web
+store.
+
+## Features ##
+
+ * Measure ground pressure and peak altitude pressure.
+ * Blue 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.
+Here's a close-up view:
+
+<a href="v0.1/micropeak.jpg"><img src="v0.1/micropeak-640.jpg"</a>
+
+### Software features ###
+
+ * Saves last flight data to non-volatile memory.
+ * Reports previous flight on power-on.
+ * Automatically shuts down on landing to preserve battery.
+
+### Developer View ###
+
+ * 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 15 hours on the pad or in flight
+	* Standard 6-pin AVR programming interface.
+
+ * Software Features
+	* Written in C
+	* Samples pressure every 96ms
+	* Detect boost with 4m 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)
+
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