Silly question

[mackrackit]

http://www.parallax.com/tabid/768/ProductID/77/Default.aspx
Ideas

[sayzer]

with this


http://www.parallax.com/Store/Sensor...6/Default.aspx

you can do what you asked with 16F628A.

This cam gives you analog output for the surface it is sensing for each pixel (128 pixel).
The pixels are mapped with gray scale 0 - 255.
Since you only need black and white as 1 and 0, you do not need analog feature.
Also, you can see the surface from 10cm above.
It gives you a line of 128-pixels in an array; in your case, 0's and 1's.

With your coding, you can see the line on the surface something like 0000000000111111110000000000.