Powered by pneumatic solenoid valves and an Arduino microcontroller, a fire-breathing dragon will be appearing in Marin County, California, on October 31. The project began last year, when the now 17-year-old Sam DeRose and his 16-year-old friend Alex Jacobson teamed up with their fathers, Tony and David, to design a robotic version of the friendly dragon Saphira from the Eragon fantasy novel and movie.
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