MicroPeak is a peak-recording barometric altimeter for precision model
rocketry altitude measurements.
Production units will be available from the
[Garbee and Garbee](http://auric.gag.com) web
store.
## Documentation ##
The MicroPeak manual is available in
[html](../AltOS/doc/micropeak.html) and
[pdf](../AltOS/doc/micropeak.pdf) formats.
## Hardware 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.
## 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.
## Developer View ##
Here's a close-up view of the hardware
* 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)
Production units will be available from the
[Garbee and Garbee](http://auric.gag.com) web
store.
## Documentation ##
The MicroPeak manual is available in
[html](../AltOS/doc/micropeak.html) and
[pdf](../AltOS/doc/micropeak.pdf) formats.
## Hardware 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.
## 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.
## Developer View ##
Here's a close-up view of the hardware
* 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)