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Remote controls of televisions are indispensible| Remote controller of TVs emits Infrared rays
In the past, at the beginning of introduction of televisions into the market, there were very less number of channels. As there was no facility to watch many channels at that time, a band setter is provided with in the television, which can be operated by hand. By rotating the band setter, the desired channel can be selected. Then it was not a problem due to the less number of channels. But in today’s satellite world, due to the development of satellite technology and scientific advancements made, many national and international channels became available all over the world. It is very difficult to change hundreds of channels by operating band setter with hand. That’s why modern televisions are provided with remote control devices with which channels can be changed easily. Through remote controller, one can change the channels as required comfortably sitting at a distance from the television. There will be a LED transmitter in the remote control. Through the transmitter, infrared rays are emitted.
It sends the coded signals in cone-shaped pattern. These signals are detected by the receiver in the television. Receiver in the television absorbs the signals emitted by transmitter and responds to the commands made by the transmitter through these signals regarding switching on and off the television, change of channels, picture clarity, regulating the volume of sound, changing the intensity of colors etc. Thus receiver makes necessary adjustments sent by transmitter. But there is a small drawback in the use of remote controller. The transmitter of it, do not work in case of any obstruction caused by man or wood or any bulky thing from reaching its signals to television. Also remote controller does not work from too long distances. That’s why there should not be any obstacle between remote controller and television while using.
