The PicoScope 2105 scopes are handheld oscilloscope probes that hook up via a USB 1.0 or 2.0 port, and only need free PicoScope software to work on any laptop or desktop PC. They can display signals from 100mV to 20V, and equivalent time sampling enhances the sample rate for measuring continuous signals. They have a large 24k sample buffer and fast 100MS/s sampling. Drivers are available for situations such as C, VB, Delphi, LabView, and VEE. An entry-level version of the scope, the PicoScope 2104, is also available.
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.