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I want to build an arduino that can calculate the current density altitude.

The minimum information that I need are:

1) Actual pressure (station pressure) in Hg
2) Temperature in Celsius

Would like to output it to a display.

I plan to use the Arduino uno kit but with so many sensors for temperature and barometric pressure I don’t know which one would be best for my first project.

I want to upgrade this project with altitude, angle compass and gps in the future.

help with sensor selection and screen is greatly appreciated at this point.


« Last Edit: July 22, 2011, 01:07:01 am by smoothisfast » Logged

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Go throught the Arduino shield list and search for available shields. It's the easiest way to get started.
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"It's the easiest way to get started", maybe if the shields are still available.

Get something like this
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=TP-29-ND
Measure the analog voltage it creates with temperature.
May need some amplification.
Or maybe this
http://www.gravitech.us/i2c12ditese.html

Barometer like this, SPI interface.
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=MPL115A1T1CT-ND
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http://wahiduddin.net/calc/density_altitude.htm

Good page, from an aviation viewpoint.
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You might have a look at this:

http://www.ladyada.net/learn/sensors/bmp085.html

markbee
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Temp/Humidity
http://www.sparkfun.com/products/10167
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How do you calculate the density altitude from humidity & temperature? smiley-wink

markbee
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See  reply #3 markbee. Need the other elements also.
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Just finished looking over the math and figured out the formulas for calculating Density Altitude.

Here are the information I need to run the math:

Temp
Relative Humidity
Station Pressure


I do need a humidity sensor. After doing some reading and searching I think I will start with this sensor for humidity

http://www.sparkfun.com/products/10239

and this board for Barometric Pressure and Temperature

https://www.adafruit.com/products/391





« Last Edit: July 27, 2011, 03:55:44 pm by smoothisfast » Logged

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