What are motion sensors?

A motion sensor is like a detective that knows when someone or something moves nearby.

Imagine you have a toy that wakes up when you shake it, that’s kind of how a motion sensor works. It sits in one place and watches for changes around it, like when you walk by or a door opens.

Think of a motion sensor as a special kind of eye. It can see movement, even if you're not making noise. When something moves, the sensor notices the change and sends a message, like telling a light to turn on or a doorbell to ring.

Some houses have lights that come on when it gets dark and someone walks in. Those lights use motion sensors. It’s like having a friendly robot inside your wall who says, “Hey, I see you! Let me help you find the way.”

So, a motion sensor is just a smart helper that knows when to act, like your toy that wakes up when you shake it, but in real life!