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Author Topic: how do I get arduino to read black and white?  (Read 602 times)
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I have this idea for a black and white photograph to be scrolled across in front of a sensor which reads the shade of black/white at any point in time and send this data to arduino.

a) what kind of sensor do I need?
b) can this sensor read 'shades' or can it only tell if it's black or white?

Cheers!
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If I understand correctly you want to build some sort of greyscale scanner?
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Rob Tillaart

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Yes. A greyscale scanner is what I'm after. So I would need to build it? There's nothing already on the market?
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I don't think you connected the grounds, Dave.
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Quote
There's nothing already on the market?
Yes, they're called "scanners" or "fax machines".
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A QTI Sensor can tells shades of gray if you hook it up to an analog pin.  Of you could overkill it and get a Linescan Imaging Sensor that pretty much takes a picture of your picture and saves it.  Or, you could buy a light to frequency IC (TSL230R) and get your math on.

...or you could just scan it.  You've got some options here.
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