when it detects a moving target. Most Digital PIR sensor modules have three connector pins: Vcc (5V), Ground (0V), and Output. The output is a digital LOW or HIGH, depending on whether the sensor has ...

All you need is an Arduino, a motion sensor, a few wires and headers, and the code provided at the site below. Hit the link to see step-by-step instructions on how to put it together.

The Etch a Sketch toy has gone more or less unchanged for over 60 years, but if you’re handy with a soldering iron you can build an upgraded version that swaps aluminum powder for glowing LEDs.