move the board, or sweep your eyes from left to right across the table it's on. You'll detect the individual events, with a sense of order. your eyes are edge t

move the board, or sweep your eyes from left to right across the table it's on. You'll detect the individual events, with a sense of order. your eyes are edge triggered with a relatively slow reset. I think you'll find you can detect much finer grained deltas in time.