I'm trying to measure the obstruction of a light sensor (i.e: the instant when something physical is blocking it from receiving any light), and need to be able to signal the moment the light sensor is obstructed with high temporal frequency. The best way to do this is probably by using digital interrupts; however, a photo cell receptor can only be read by analog input. Does anyone have suggestions how to tackle this one? I've read somewhere the best way is to use an analog comparator, but I do not quite understand how to use and set up its register. Using an Arduino Uno.
Thanks a million :slight_smile: !