How do Wireless Doorbells Work

A doorbell is a necessary installation for any house. For many years now, wired doorbells have been standard installations. That trend is slowly changing as the wireless electronics revolution has changed the way doorbells are made too. Wireless doorbells are fast replacing conventional wired doorbells, due to their comparatively easy installation and ease of use. In an increasingly unplugged world, as we do away with wired connections and increasingly rely on wireless communication, it is but natural that even doorbells go wireless. In this Buzzle article, I have explained how do wireless doorbells work to herald the arrival of visitors.



To fully understand the working of a wireless doorbell, I will have to take a brief detour to explain the fundamentals of wireless communication. Modern cell phones, WiFi networks and Dish TV antennas, along with countless other devices use modulated radio signals as the communication medium. Every wireless communication based system is made up of a dual combination of a transmitter and a receiver.



Radio signals are modulated electromagnetic carrier waves, on which a signal is superimposed for transmission. On reception of the signal, the receiver, which is tuned to the frequency of the carrier wave, decodes and demodulates the signal to its original form. This is how wireless transmission works. Let us now see how this principle of radio communication works in wireless doorbells.