A motion sensor activates the light when it detects something moving within its field of view. Photocells work with a resistor that changes its conductivity based on how many photons are hitting it.

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.

Motion sensors are one of the best energy-saving smart devices you can have for your home. While they're typically used to pick up movement, they're also equally effective at prompting events when ...

News Channel ‘Minority Report’ With Arduino Motion Control Glove for Kinect By Elizabeth Fish Jun 6, 2012 2:18 pm PDT ...

This is a firmware application written in C++ using Arduino and Adafruit libraries. It sleeps in low power mode until, activated by the motion sensor, it takes a picture.

Aqara this week released the Presence Sensor FP2 – a brand new millimeter wave sensor that goes far beyond the capabilities of more conventional motion sensors to facilitate powerful automations ...

For a HomeKit-only motion sensor, the Aqara P2 is as good as any motion sensor on the market. You can automate your lights. You can leverage it to save energy costs. It has a long-lasting battery.