RFID and elevator: what they have in common

1. Step 1. RFID — is used in — Turnstile. Contactless cards.
2. Step 2. Turnstile — has part — Ratchet. A ratchet.
3. Step 3. Ratchet — is part of — Windlass. A ratchet holds the load.
4. Step 4. Windlass — is part of — Drawbridge. Raised with a windlass.
5. Step 5. Drawbridge — uses — Counterweight. A counterweight.
6. Step 6. Counterweight — is used in — Elevator. A counterweight balances the car.

Open Evothings