Remote controlled toys are typically controlled by a transmitter, which sends a signal over a frequency to the receiver that sits in the toy being controlled. The transmitter has a power source, usually a battery, which ... More »

A radio-frequency remote control works by sending a radio signal from a transmitter to a receiver, which activates motors inside the radio-controlled device. A radio-controlled toy helicopter, for example, only requires ... More »

Car remote start systems use a coded pulse of radio signals to initiate a car's ignition sequence remotely when the remote starter's controller is activated. Remote starters are integrated into a car during production or... More »

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A radio-frequency remote control works by sending a radio signal from a transmitter to a receiver, which activates motors inside the radio-controlled device. A radio-controlled toy helicopter, for example, only requires ... More »

An auto keyless entry system has two components: a transmitter unit and a receiver unit. Both units work in the same radio frequency. When a driver pushes the button on his transmitter fob, the transmitter sends a specif... More »

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Walkie-talkies are small portable radios with both a receiver and a transmitter. They can both broadcast and pick up radio signals and make for an easy way to communicate when cellphone signals are not available. More »

According to Coulton.com, a differential pressure transmitter works by sensing the difference between two different ports and then producing a signal that corresponds to a certain range of calibrated pressures. Usually t... More »