1 <center><img src="micropeak-nofont.svg" width="320"/></center>
3 MicroPeak 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 The MicroPeak manual is available in
16 [html](../AltOS/doc/micropeak.html) and
17 [pdf](../AltOS/doc/micropeak.pdf) formats.
19 ## Hardware Features ##
21 * Measure ground pressure and peak altitude pressure.
22 * Blue LED blinks out maximum height in decimeters.
23 * 18mm x 14mm. 1.9g including battery.
26 The CR1025 battery holder is mounted on the back side of the board, so there are no external wires or batteries to manage.
28 ## Software features ##
30 * Saves last flight data to non-volatile memory.
31 * Reports previous flight on power-on.
32 * Automatically shuts down on landing to preserve battery.
36 MicroPeak includes an integrated battery holder on the back side of
39 <a href="v0.1/micro-peak-back.jpg"><img
40 src="v0.1/micro-peak-back-640.jpg"></a>
44 Here's a close-up view of the hardware
46 <a href="v0.1/micropeak.jpg"><img src="v0.1/micropeak-640.jpg"></a>
49 * [ATMEL ATtiny85](http://www.atmel.com/devices/attiny85.aspx) Microcontroller
54 * [Measurement Specialties MS5607](http://www.meas-spec.com/product/t_product.aspx?id=8499) Micro Altimeter Module
55 * Wide range — 120kPa to 1kPa (approximately -1500m to 31000m)
56 * High precision — 2.4Pa resolution (approximately 20cm at sea level)
58 * CR1025 Lithium Battery
59 * 30mAh. Runs MicroPeak for 15 hours on the pad or in flight
60 * Standard 6-pin AVR programming interface.
64 * Samples pressure every 96ms
65 * Detect boost with 4m altitude change
66 * Exponential averaging filter to minimize transient effects.
69 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
70 * [GCC](http://gcc.gnu.org) as an AVR cross-compiler
73 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
74 * The software is licensed [GPL version 2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html)
77 <center><img src="../logo.svg" width="100"/></center>