This article describes how I have set up a simple “door-sentry” at home. The door-open detector is designed to alert you to an unauthorized entry in a confined area. It uses a little ATtiny85 ...
Recently I was able to build a version of a tiny microcontroller-based LED strobe light for RC airplanes. The build is not very advanced, but it is almost a complete kit. Let’s start with the easy ...
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