Stefan-XpHave you seen some of the interactive LED tables? How awesome are they!?
The IR and IR Diode part is still strange to me :D
In fact i have no clue whit it is working... Last time it worked it had Analog Values between 0 and 60 (active) with Internal Reference (2.56V). Is it enough to work with? Do you have a better schematic proposition?
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Is it really ground on the bottom left? This way you would only get up to 0.7V ...compared to your reference that seems to be about right since you would also lose power over the resistor on the bottom right. Try vref on there and you should get a bigger resolution.
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Yepp its like i drew it. 825k is a big resistance, its nearly "Solar Cell Mode" :-D
Perhapps I try the second schematic soon :)
http://www.mikrocontroller.net/articles/Lichtsensor_/_Helligkeitssensor#Photodiode
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