Änderungen

355 Bytes hinzugefügt , 15:04, 9. Mär. 2015

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==Get the Time==

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[[Image:~~Arduino_DS1307~~.jpg|thumb|timer chip DS1307 with Arduino]]

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[[Image:Arduino_DS1307_FritzingExport.jpg|thumb|timer chip DS1307 with Arduino]]

To get Greenwich Time (aka UT) I use a DS1307 chip.

Following the description of http://www.glacialwanderer.com/hobbyrobotics/?p=12

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These calculations I have put into another library (Helios.h)

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Use following program plus libraries for older Arduino IDE (0023 and older):

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For newer Arduino IDE (1.0.1 and later) use instead the following package,

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{{zip|SolarTracker4Arduino1.0.1.zip|17KB|Version from 16.01.2015}}

Once you got it running, verify the calculated positions, for instance with

[http://www.sunearthtools.com/dp/tools/pos_sun.php solar position calculator] from

sunearthtools. (Attention: SolarTracker4Arduino does NOT account for daylight saving time (DST),

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you have to determine UT as if there was no DST at all.)

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you have to determine UT (when you set your timer chip) as if there was no DST at all. On the other hand, sunearthtools allow using DST,

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and this option is selected by default.

==SPA Algorithm==

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Bearbeitungen

Solar Arduino tracker (Quelltext anzeigen)