Astrolabe and smart meter: what they have in common

1. Step 1. Astrolabe — works like — Armillary sphere. Three-dimensional and flat models of the celestial sphere.
2. Step 2. Armillary sphere — uses — Euclidean geometry. The rings model the celestial circles.
3. Step 3. Euclidean geometry — is used in — Shukhov Tower. The hyperboloid is assembled from straight bars.
4. Step 4. Shukhov Tower — has part — Antenna. A radio tower.
5. Step 5. Antenna — is part of — Radio module and antenna. An antenna.
6. Step 6. Radio module and antenna — is part of — Smart meter. Data transmission.

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