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2. Ladder paradox - Wikipedia

   en.wikipedia.org/wiki/Ladder_paradox

   In a more complicated version of the paradox, we can physically trap the ladder once it is fully inside the garage. This could be done, for instance, by not opening the exit door again after we close it. In the frame of the garage, we assume the exit door is immovable, and so when the ladder hits it, we say that it instantaneously stops.

3. Garage door - Wikipedia

   en.wikipedia.org/wiki/Garage_door

   Sectional doors do not require any space outside the garage to open. A vehicle may park very close to the garage before opening the door. Each panel of a sectional door has its connection to the door track. This increases reliability and robustness compared to monolithic doors, which have only a few track connections for the whole panel.

4. Rolling code - Wikipedia

   en.wikipedia.org/wiki/Rolling_code

   Remote controls send a digital code word to the receiver. If the receiver determines the codeword is acceptable, then the receiver will actuate the relay, unlock the door, or open the barrier. Simple remote control systems use a fixed code word; the code word that opens the gate today will also open the gate tomorrow.

5. The best stocking stuffers for men, from tools to Tile Mates

   www.aol.com/lifestyle/best-stocking-stuffers-for...

   This tiny device connects to the vast majority of modern garage doors and creates the ability to open or close your garage door via smartphone app, or even voice assistant if that’s your thing ...

6. Garage door opener - Wikipedia

   en.wikipedia.org/wiki/Garage_door_opener

   A residential garage door opener. The motor is in the box on the upper-right. A garage door opener is a motorized device that opens and closes a garage door controlled by switches on the garage wall. Most also include a handheld radio remote control carried by the owner, which can be used to open and close the door from a short distance.

7. Limit switch - Wikipedia

   en.wikipedia.org/wiki/Limit_switch

   A set of adjustable limit switches installed on a garage door opener shut off the motor when the door has reached the fully raised or fully lowered position. A numerical control machine such as a lathe has limit switches to identify maximum limits for machine parts or to provide a known reference point for incremental motions.