Bill Bowden asked, "Why not use a standard infrared remote
control from a TV, DVD player or cable-TV box to control other things?"
So, Bill's Gadget Freak project does just that. His infrared (IR) receiver
decodes the signals from remote controls and uses the data to individually turn
on or off four circuits via an isolated relay circuit. Bill tested his circuit
with more than 25 types of remote controls. Let's just say, "Click on,
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.