We all know that remote control helps to control electronic devices from distance but what exactly makes it work so fluently, let’s know the working of remote control today:
The remote is the chip that converts information on the key pressed in a sequence of electrical pulses, which are fed to the emitter (usually infra-red LED).In turn, the transmitter transmits the already visually transformed signal to a photo detector, which is located in the electronic devices (TV, Video player, or air conditioner, etc.).Having the information in visual form, a photo detector converts it into a sequence of electrical pulses which are fed to the control unit device chip. After you press one of the buttons on the remote control, first light signal is converted into a form, and then back to an electrical signal. The convenience of such a system is that with a sequence of pulses (electrical signal) can record a very large amount of information. This allows not only to attach the remote control of a large functional content, but also to use almost every electronic device a unique code to avoid causing false positives or other electronic devices, control that is not currently required.
In simple words, when we press the button a circuit is completed, e.g. when we channel up (+) changing channel circuit completes which after then sends the information to LED at the front of remote which then series of light pulses is transmitted to the electronic device to perform the operation which is changing of channel here.
*All these button actions are in form of binary numbers which is converted into rays.
You must have seen a small LED red light on a remote, if not pick your remote to see (it must be in the beginning, e.g. image below):
What is a universal remote control?
A universal remote is programmed simply to make it operate various types of electronic devices, right from TV to DVD player regardless of the brand or model stereos. These remote control look and have a similar button layout as normal remote controls which comes with a TV or DVD player, and are used in the same manner.
Each brand has a certain number of TV code associated with it. The remote control that comes with this particular TV is programmed to work with this brand-numeric code. So a Sony remote control to control a Sony TV; however, it will not control a Panasonic television set, as a numerical code from Panasonic is from Sony. A universal remote control has several numerical codes that allows it to be programmed to control devices from different brands.