How Do Smartphones Know When to Vibrate?

Smartphones vibrate when they get a message because there's a special sensor inside that tells the phone to shake. It’s like having a tiny motor in your pocket that only turns on when you need it, like when your mom calls, and you’re in class!

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Examples

  1. Your phone buzzes when you get a message because it knows someone is talking to you.
  2. When your friend texts you during class, your phone vibrates so you can feel it in your pocket without looking.
  3. You tap on the screen of your phone and it starts vibrating, like a little motor inside is saying ‘Hey, I’m here!’

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