Do neighborhood animals dig up your flower beds or get into your trash? Rick Prescott created a computer-controlled "machine gun" to help deter local pests, including the two-footed kind that invade work cubes. Rick mated an infrared sensor with a Nerf-brand gun that shoots spongy "bullets" to create the Infrared-Seeking Sentinel. An Atmega168 microcontroller tracks a heat source and unleashes either a single shot or a fury of automatic fire. Zap, zap, zap. Take that, Mr. Dog.
An in-depth survey of 700 current and future users of 3D printing holds few surprises, but results emphasize some major trends already in progress. Two standouts are the big growth in end-use parts and metal additive manufacturing (AM) most respondents expect.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.