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[youtube http://www.youtube.com/watch?v=MHTe8d_9D4Y?enablejsapi=1&autoplay=0&%23038;cc_load_policy=0&%23038;iv_load_policy=1&%23038;loop=0&%23038;modestbranding=0&%23038;rel=1&%23038;showinfo=1&%23038;playsinline=0&%23038;autohide=2&%23038;theme=dark&%23038;color=red&%23038;wmode=opaque&%23038;vq=&%23038;controls=2&%23038;&w=640&h=388]
Video shows photos and code for measuring the speed of objects passing through a detector array for a ballistic chronograph.