TK has combined a PIR with an Arduino to create a smart safety light for the house or workshop. Follow along as this gets built out into a more extensive project.

Here is an ultra simple Arduino Night Alarm project wired around a handful of inexpensive and easily available components. One advantage of using Arduino as a security system is the flexibility!

Present consists of just a PIR sensor and Arduino in a 3D printed enclosure to snap onto your monitor.

If you've always wanted to try to build an Arduino project, this may be a great way to start. Matt Williamson built a tiny, Arduino-based motion sensor that will SMS you when something moves by ...

The motion sensor Arduino Shield project is currently over on the Kickstarter crowd funding website looking to raise enough pledges to make the jump from concept to production.

Bang—motion sensor. Project Ideas Depending on the sensors and actuators you use and how you combine them, this fairly simple concept can do some surprisingly complex things.

This breadboard compatible package combines an ESP32-S2 module with a top-mounted PIR sensor, making it a turn key solution for all sorts of motion sensing projects.