| Radio remote controls use radio waves to
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| | frequency.
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| send commands to different devices. These
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| | For example, alarm and security systems
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| are electromagnetic waves of varying
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| | work at 40 megahertz, mobile phones
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| frequencies, emitted through antennas and
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| | between 824 to 849 megahertz and an air
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| picked up by radio receivers.
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| | traffic radar at anywhere between 960 to
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| Therefore, when you press a button on
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| | 1,215 megahertz. Now the question arises
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| your radio remote, it sends radio waves
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| | that, if there are so many frequencies
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| to your music system, which decodes the
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| | traveling in the air at the same time,
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| signal and obeys your command. An amazing
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| | how do gadgets know which ones to receive
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| aspect of radio remotes is that they can
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| | and which to ignore? When advanced radio
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| send signals from greater distances,
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| | remotes send radio waves, their unique
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| since radio waves travel as long as 100
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| | digital address is also sent embedded in
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| feet to reach the receiver. They can even
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| | the waves, which the target receiver
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| penetrate walls, and therefore an
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| | recognizes and accepts. This smart
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| increasing number of modern appliances
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| | technology is already being used in
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| are now being designed with radio
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| | cellular phones, Wireless Fidelity (WiFi)
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| remotes.
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| | environments and cordless phones.
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| Bluetooth technology also uses the
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| | In the future, as our need to remotely
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| principle of radio frequencies. For
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| | control multiple appliances increases,
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| example, Bluetooth technology can
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| | radio remotes will be seen playing
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| interconnect your home theater system,
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| | greater roles. Tasks in risky
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| mobile phone, music system, computer and
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| | environments, such as space and military
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| television by using radio frequencies to
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| | scenarios, can be performed through
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| send signals between them. It creates a
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| | remote control. Devices and remotes will
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| wireless community of your gadgets that
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| | become more intelligent as radio remote
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| literally speak to each other. Every
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| | control technology develops.
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| appliance works on different bands of
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