This library provides a non-blocking way of processing the input from an analog input source, from a piezo/knock/vibration sensor. Inspired by "knock" projects, and my work on the Door Knock Notifier, ...

An Arduino-Based Intruder Detection and Alert System is a security device designed to detect unauthorized entry into a property and alert the owner or security personnel. Using Arduino, such systems ...

I'm trying to get block detection working on my HO scale model railroad. I found this page and liked the idea of using current transformers to detect the Digital Command Control signal inducing ...