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.

PIR motion sensors use infrared light to detect movement. Light is emitted and the sensor will trigger if it can't detect its reflection, enabling a basic form of motion detection based on the ...

Historically, we’ve used IR and ultrasonic sensors but [Makers Mashup] decided to use an ESP32-Cam as a motion sensor in his latest animatronic creation.

This is an Arduino-based Proximity Sensor circuit wired using the popular HC-SR04 Ultrasonic ranging module,used here for non-contact object detection purpose. The HC-SR04 module includes ultrasonic ...

Amazon Echo’s built-in ultrasonic motion sensing can let you easily automate lights and fans with Alexa routines, without buying anything else.

Your Amazon Echo has a hidden motion sensor feature that allows you to do some pretty cool stuff, from switching on lights to setting alerts for intruders.

As a perfect example, take a look at this stupendously simple Internet-connected motion detector that [Eric William] has come up with.