How do remote garage doors work?

How do remote garage doors work?

Well, remote garage doors consist of transmitters that transmit radio signals of a particular frequency which is received by the receivers. It generates a new code using an encoder When the transmitter sends a code.

The receiver, after receiving a correct code, uses the same encoder with the same original to generate a new code. Depending on the position of the door it will open or close if both the frequencies match.

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