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=General considerations=
 
=General considerations=
To calculate the solar position with a microcontroller (on a fixed geographic place)  
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For calculation the solar position with a microcontroller (on a fixed geographic place)  
 
you have to solve two problems:  
 
you have to solve two problems:  
 
The controller needs a time device (typically a battery buffered chip like in a PC)
 
The controller needs a time device (typically a battery buffered chip like in a PC)
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==Calculate Azimuth and Elevation==
 
==Calculate Azimuth and Elevation==
To calculate the solar azimuth and elevation exactly
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The formulas for exact calculation of solar azimuth and elevation  
you need very involved formulas. However, for practical
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are very involved. However, for practical
 
purposes like sun tracking of a heliostat there are
 
purposes like sun tracking of a heliostat there are
 
simpler ones available.  
 
simpler ones available.  
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[http://klaus.e175.net/solarpositioning Klaus Brunner]. It was also a valuable help for debugging
 
[http://klaus.e175.net/solarpositioning Klaus Brunner]. It was also a valuable help for debugging
 
the Arduino implementation.
 
the Arduino implementation.
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--[[User:Hannes.hassler|Hannes.hassler]] 13:36, 3 March 2011 (CET)

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