The only stipulation is that I cannot use any sort of scale or pressure system to determine the change.
Thanks for the ideas. I'm really looking for something that fairly inexpensive, pretty accurate and not too challenging. As I mentioned I need to track the height of the book stack as it changes in a confined space - a box. With that said, it sounds like the two IR stips (transmitter and receiver) might be the way the go as posted by astrofrostbyte. Can some recommend a manufacturer or perhaps provide a link for the stips? Would they work with an Arduino board? If at all possible can someone also suggest a link where I might find some sample code associated with using the IR stips? I really appreciate everyone's input and advice.
Quote from: tdirodis on Mar 05, 2013, 05:58 amThe only stipulation is that I cannot use any sort of scale or pressure system to determine the change. I believe this is why, Peter.
Idea was to use a 1->8 or 1->16 Digital Mux for your led's , and 8->1 or 16->1 analogMux for photodiodes depending how many led's(books-levels) you need/have. I think this can fit on a Arduino nano/mini, but still unclear what your Userinterface is.