5 Essential Elements For How to quiet a noisy garage door opener

315MHz features a wavelength of about one meter (3 foot). If the distance from opener to the sensor is (such as) a complete quantity of wave lengths, and the gap in the opener to your auto and then into the sensor is 50 % a wave duration over a whole range, then the echo will get there away from stage with the original signal and cancel it.I'm Rick

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