Smartphones: how they know Up from Down
Have you ever wondered about the magic behind a smartphones’ capability to know when it is being held Up or Down? Well you’re in luck if you answered yes as Bill the Engineer guy explains how this works, along with the amazing technology behind it. Today’s smartphone’s are amazingly superior compared to the first portable phone release to the public in the 1980′s. They have come a long way from a huge fat brick-phone to small portable computers held in the palm of your hands.
Using an accelerometer chip, smartphone’s can tell when they’re held upside down or right-side up by simply measuring changes in gravity. Inside the chip is a small accelerometer made out of silicon with small finger-like combs that move back and forth with gravity and make up a differential capacitor. From here, the magic begins.