With their extra jolt of heat, lead-free solder processes can be tough on the engineering plastics used to make connector housings. DSM Engineering Plastics, whose Stanyl nylon 46 resins go into many types of connectors, recently undertook an extensive design of experiments to identify the processing profiles that minimize temperature effects such as "blistering." For more information, go to www.dsmep.com.
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.
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