How Does a Bike Computer Count Wheel Turns?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. How does a bike computer count wheel turns?

The Big Idea

A bike computer can tell you how fast you are going and how far you have ridden. But it never touches the wheel! The trick is a tiny magnet and a sensor that notice each turn.

Magnet on the Spoke

Step one: a magnet on the spoke. A small magnet is clipped to a spoke, and a sensor is attached to the fork. Each time the wheel spins around, the magnet passes the sensor.

Count the Passes

Step two: count the passes. The computer counts each pass of the magnet. Because it knows how far the tire rolls in one turn, it multiplies to find the distance.

Find the Speed

Step three: find the speed. The computer divides the distance by the time to find your speed. It does all this without ever touching the wheel.

A Closer Look

Let's take a closer look! The magnet is on the spoke. The sensor is on the fork. Each pass counts as one turn. Then the computer does the math.

Quick Facts

Quick facts! A smaller wheel needs more turns to go the same distance. The magnet passes the sensor once each turn. Dividing by time gives your speed. Multiplying gives the distance.

Think Like a Scientist

Now, think like a scientist! Measure around a bike tire with a string. Count how many turns it takes to roll across a room. Multiply to check the room's length. Compare with a measuring tape. Share your results with someone you love.

Outro

A bike computer counts wheel turns with a magnet and a sensor, then uses math to find distance and speed. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!