Using motion detectors and an Ardunio you can add a little extra wow to your Halloween displays this year. This article covers the circuits and the code to make that happen.

12:22 pm September 9, 2016 By Julian Horsey Using the power of Arduino, Evan Kale has ingeniously transformed a weed wacker into an Arduino-powered metal detector.

The Arduino samples the peak detector’s output and calculates the original pulse’s amplitude. Their webpage has copious details on where to get the parts, the software and how to make it.