Control it will an Arduino Mini, Servo, Ultrasonic Rangefinder, and Battery Power

My third paper automata assignment was “Weight of Bureaucracy” from book, Models that Move. I was super fun automata, but it took more than 6 hours to actual making the paper automata. The challenge part was the servo has to turn only one way, otherwise the paper automata is broke. So, I had to carefully observe ultrasonic rangefinder values and calculate servo position for  the value in code. Using an Arduino Mini and an battery power were simple and easy.

Please watch video at vimeo: