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.
A make-your-own Star Wars Sith Lightsaber hilt is heftier and better-looking than most others out there, according to its maker, Sean Charlesworth. You can 3D print it from free source files, and there's even a hardware kit available -- not free -- so you can build one just in time for Halloween.
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.