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Home › Magazines › 2009 › October › Barometric Altimeter

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Barometric Altimeter

Mountaineers, delta glider and UL pilots -- this one's 4 U

Published in issue 395, October 2009

Barometric Altimeter
In this project a piezoresistive transducer measures the atmospheric pressure, enabling a PIC microcontroller to use the ISA model (with temperature compensation) to display your current height above sea level (ASL) on an LCD.

Extra info, Updates

Components

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Specification and features
Altitude range: 0 to 11,000m A(M)SL
Compliant with ISA model, extended with temperature compensation
Barometer range: 15 kPa to 115 kPa
Resolution: 3 m.
Temperature range: –55 °C to +125 °C
Real Time Clock
Supply voltage: 6–15 VDC;
Current consumption
- LCD backlight on: 18 mA;
- LCD backlight off: 8 mA;
- Standby: 20 µA
Menu controlled
Software: C for PIC

Click below to download a PDF copy of this article from Elektor magazine.

 

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Order this magazine 
Magazine October 2009
UK394 (USD 7.50)
 

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PIC18F2423, programmed
080444-41 (USD 24.00)
PCB, bare
080444-1
 

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Software

Free download
Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

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