Input from its on-board temperature sensor or remote temperature, humidity and water sensing probes, allows this digital control system to provide dual-zone coverage for precise monitoring of critical environments. The EA400 accepts four sensor inputs and has alarm outputs that include four configurable SPDT relays. Digital control provides flexibility for simultaneously monitoring and the user-friendly configuration of eight event alarms with memory storage and time and date recording. Among the programmable features is a delay time entry mode that ignores programmed limits in a situation such as a defrost cycle for the time specified in the time delay.
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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