While PIR sensors can be used with Arduino and other microcontroller boards, those best-suited for hobby use are smart enough to perform simple tasks without any programming.

Make sure the adjustment knobs for sensitivity and on-time for the motion sensor are facing up so you can modify how sensitive your device is and how long it stays on to signal your Arduino.

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. You’re ...

Outdoor light motion sensors can add a healthy level of security to your home. Here's how to set them up.

A motion sensor by my bed turns on a kettle connected to a smart plug, starts playing my Alexa Flash Briefing, and turns the kitchen lights on one time if it senses motion between 5 a.m. and 7 a.m.

Think of motion sensors, and your first thought probably goes to security. An intruder enters your property, the sensors detect them, and floodlights snap on. The same principle applies for ...

Adjust the motion sensor sensitivity with the slider control labeled "Sensitivity." Slide the control to the left to make the sensor less sensitive and to the right to increase sensitivity.

If your iPhone's sensors aren't working correctly, you may need to calibrate them. Here's how to calibrate an iPhone's brightness and motion sensors.