Picture of Weather station Arduino and Processing
photo (2).JPG
photo (1).JPG
Build a mobile or home weather station and graph the data in real time on your computer. The graph maps out wind speed, pressure, temperature, and wind direction for 10 minutes then saves the image as a jpeg and starts over.
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Step 1: Anemometer build

Picture of Anemometer build
The anemometer I built was built with materials I had on hand. I based the build around a DC motor I had that spins freely with little effort. the diagram list the parts I used.

Step 2: BMP085 housing

Picture of BMP085 housing
The BMP085 barometric pressure sensor uses I2C bus to communicate with the Arduino. When choosing a BMP085 breakout board the main feature to look for is 5v capability as this will broaden the range of possibilities and simplify wiring. I recommend http://www.adafruit.com/products/391. I used CAT5e to connect the anemometer and sensor to the Arduino in my vehicle. the max distance you can run I2C on CAT5e wire is about 25 feet. for distances longer than 25 feet I would consider wireless. I painted the Coke can white to cut down the false temp reading during full sun.
Having a picture of the data is a great idea, otherwise it's a lot of data to store somewhere.
MonteH (author) 1 year ago
My original plan was to use a compass module. https://www.sparkfun.com/products/7915. This runs $35 and I was not willing to pay that so I made a continuous pot with a graphite based semiconductor and copper wipers. I built the pot on top of a hard drive motor. The wipers created drag and greatly decreased sensitivity.
ursm1 year ago
hi MonteH
during reading I've expected that the wind vane was impossible to work with a potentiometer.
the vane must be able to turn freely around 360°.
for that the transmition of the position should be optically or by magnets.
have a look at http://www.google.ch/imgres?imgurl=http://ginad.org.uk/weathergd/images/00-vane-angles-optical-11-02-07-sml.png&imgrefurl=http://stargazerslounge.com/topic/161623-arduino-based-weather-station/&h=771&w=771&sz=190&tbnid=LzHDpgB00Hs9mM:&tbnh=84&tbnw=84&zoom=1&usg=__zfGV6bUICXhqeW5sQauRhw2FzrE=&docid=2Y73kq1jLyytUM&sa=X&ei=qecoUoXxGaGG4ASVp4C4Bw&ved=0CE8Q9QEwAg&dur=6854
regards, urs