I am working on an electrical project that, actually works something like a touchscreen digitizer, where I have to generate multiple inputs from over 50-100 sources, and I need to check from which sensor or a group of sensors (probably 3-5) are giving the signals, and then which sensor among the group has the highest electrical signal.
So I would like to know, if there is some way to do this. It has a lot of resemblance with the a resistive touch-screen digitizer, where there are many points that can send the signals, but the digitizer works by detecting exactly where the pressure has been exerted, and then it is sent to the micro-processor which calculates it according to the actual lcd screen.
A basic diagram, or a similar microprocessor reference will be appreciated.
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My sensor are basically LDR's (or probably Photo Diodes), and I need to sense light intensity on a specific group of sensors. I am working on an academic project related to robotics.
The LDR's are placed at a distance of 10 mm from each other and arranged in the form of a matrix. So if I take a laser pointer and point to a specific LDR, I should get the reading (may be in number, count) of the active LDR sensor.