3D printer und railway semaphore: was sie gemeinsam haben
- Schritt 1. 3D printer — nutzt — Program control of a machine. The layers are set by a program (G-code), as with CNC.
- Schritt 2. Program control of a machine — wird verwendet in — Zuse Z3. The program was on punched cinema film.
- Schritt 3. Zuse Z3 — hat als Teil — Relay. 2,600 relays.
- Schritt 4. Relay — ist Teil von — Traffic light. Relay controllers.
- Schritt 5. Traffic light — entwickelte sich aus — Railway semaphore. The first traffic light was a railway-style semaphore.