Bluetooth and gyroscope: what they have in common

1. Step 1. Bluetooth — is part of — Fitness tracker. A link to the phone.
2. Step 2. Fitness tracker — has part — Accelerometer. A pedometer.
3. Step 3. Accelerometer — is part of — Electric unicycle. Tilt sensors.
4. Step 4. Electric unicycle — uses — Gyroscope. Gyro sensors feel the lean, and the wheel rolls to keep the rider up.

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