How do Television Remote Controls Work?
Television remote controls work by sending a IR (infra-red) signal or an RF (radio frequency signal). The IR signal is sent when a button on the remote is pressed, the LED sends a signal similar to a binary number to the LCD eye on the device. The device decodes the signal and responds based on the number pressed. IR remotes are limited in range and must have direct access to the eye on the components. RF remotes are they types found on garage door openers, key fobs and high end components. RF (radio frequency) have a wider range that IR and does not have to have direct contact with the device. RF devices sends signals or waves through the air and the component decodes the waves and initiate the create response, such as increasing the volume or changing the channel.
