Smoke detector and GPS (satellite navigation): what they have in common

1. Step 1. Smoke detector — has part — Photodiode. An optical scattering sensor.
2. Step 2. Photodiode — is part of — Lidar. A receiver of reflected light.
3. Step 3. Lidar — is part of — Self-driving car. Lidar builds a 3D map of the surroundings.
4. Step 4. Self-driving car — has part — GPS (satellite navigation). Satellite navigation.

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