Touch layer (capacitive) and CNC machine: what they have in common

1. Step 1. Touch layer (capacitive) — is part of — Smartwatch. A touchscreen.
2. Step 2. Smartwatch — evolved from — Fitness tracker. Tracker functions moved into watches.
3. Step 3. Fitness tracker — has part — Bluetooth. A link to the phone.
4. Step 4. Bluetooth — is used in — Smart lock. Bluetooth.
5. Step 5. Smart lock — has part — Servomotor. A bolt actuator.
6. Step 6. Servomotor — is part of — CNC machine. Servo drives move the axes.

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