3 This is a peak-recording barometric altimeter for precision model
4 rocketry altitude measurements.
6 <a href="v0.1/micropeak-dime.jpg"><img
7 src="v0.1/micropeak-dime-640.jpg"></a>
9 Production units will be available from the
10 [Garbee and Garbee](http://auric.gag.com) web
15 * Measure ground pressure and peak altitude pressure.
16 * Blue LED blinks out maximum height in decimeters.
17 * 18mm x 14mm. 1.9g including battery.
20 The CR1025 battery holder is mounted on the back side of the board, so there are no external wires or batteries to manage.
21 Here's a close-up view:
23 <a href="v0.1/micropeak.jpg"><img src="v0.1/micropeak-640.jpg"</a>
25 ### Software features ###
27 * Saves last flight data to non-volatile memory.
28 * Reports previous flight on power-on.
29 * Automatically shuts down on landing to preserve battery.
31 ### Developer View ###
34 * [ATMEL ATtiny85](http://www.atmel.com/devices/attiny85.aspx) Microcontroller
39 * [Measurement Specialties MS5607](http://www.meas-spec.com/product/t_product.aspx?id=8499) Micro Altimeter Module
40 * Wide range — 120kPa to 1kPa (approximately -1500m to 31000m)
41 * High precision — 2.4Pa resolution (approximately 20cm at sea level)
43 * CR1025 Lithium Battery
44 * 30mAh. Runs MicroPeak for 15 hours on the pad or in flight
45 * Standard 6-pin AVR programming interface.
49 * Samples pressure every 96ms
50 * Detect boost with 4m altitude change
51 * Exponential averaging filter to minimize transient effects.
54 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
55 * [GCC](http://gcc.gnu.org) as an AVR cross-compiler
58 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
59 * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)