Exercise bike and joystick: what they have in common

1. Step 1. Exercise bike — uses — Eddy currents. Magnetic resistance.
2. Step 2. Eddy currents — is used in — Speedometer. An eddy-current speedometer.
3. Step 3. Speedometer — is part of — Cruise control. It compares with the speed reading.
4. Step 4. Cruise control — uses — Feedback control. Speed is held by feedback.
5. Step 5. Feedback control — is used in — Fly-by-wire. Automatic stabilization.
6. Step 6. Fly-by-wire — uses — Joystick. A sidestick controller.

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