Solar Decode
This project aims to decode the sunlight. Powered by the solar panels, this device detects the length of the shadow at noon to calculate latitude and uses the location data to set up a sundial. On an island without any wall power, this device could translate the information hidden in sunlight and make the user's life a little easier.
Latitude
At noon, local latitude value = 90 degree - sun altitude. The altitude a can be found through its tan value (stick height/shadow length).
This device calculates the latitude value by a stick and its shadow length at noon. The number of photo sense covered indicates the level of latitude. The latitude value determines the angle of a sundial.
angle=90-latitude
Computation
To be fixed...
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It only works with sunlight that is strong enough.
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The sensor value when covered or uncovered are not stable and relevant to the strength of light.
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The box is huge and the sundial is easy to be broken.
