LED and turbine: what they have in common

1. Step 1. LED — is made of — Gallium arsenide. The first LEDs were gallium arsenide phosphide.
2. Step 2. Gallium arsenide — is material for — Lidar. The laser diodes are gallium arsenide.
3. Step 3. Lidar — is part of — Robot vacuum. Navigation by lidar.
4. Step 4. Robot vacuum — evolved from — Vacuum cleaner. An autonomous vacuum cleaner.
5. Step 5. Vacuum cleaner — has part — Impeller. An impeller creates the suction.
6. Step 6. Impeller — is part of — Turbine. The bladed wheel is the turbine’s rotor.

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