How a TV remote connects to the TV?

Answer 1

The TV remote works by you pressing the buttons you want the TV to do; When the button is pressed it hits the circuit board, the chip can sense the connection in the circuit board, each button has a different code because of the different connections in the circuit board. It then translates the button into a sequence something like Morse Code, with a different sequence for each different button. The chip sends that signal to the transistor to amplify the signal and make it stronger. The amplified signal then travels to the LED. The LED transfers the signal in an infrared light to the TV. The TV then "sees" the signal and does what you originally told it to do.

Answer 2

In earlier days, remote controls wre based on ultrasonics (sound frequency above the audible range of frequencies). The controlling circuitry included a hand held transmitter 9that transmits ultrasound) and a TV-based receiver circuit. Electronic filter and stepper motors were used to allow/select certain frequencies and perform various functions depending on the key pressed.

But the recent remote controls use infra-red(IR) rays and a special binary (0 and 1) coding mechanism. The code, intensity and wavelength of the IR wave, help to select different functions. Depending on the key pressed, a signal is sent out by IR source say, an injetion laser diode(ILD). It generates a code in parallel format. This is converted to a series format by s shift register. This signal is received by photo-sensitive devices such as an avalanche photo diode at the receiver.

Here another shift register is used to convert the code back to a parallel form. This operates a one-of-n decoder, which selects one function from a set of "n" predefined functions and executes it.

Answer 3

Pushing a button on a remote control sets in motion a series of events that causes the controlled device to carry out a command. The process works something like this:

1. You push the "volume up" button on your remote control, causing it to touch the contact beneath it and complete the "volume up" circuit on the circuit board. The integrated circuit detects this.
2. The integrated circuit sends the binary "volume up" command to the LED at the front of the remote.
3. The LED sends out a series of light pulses that corresponds to the binary "volume up" command.

One example of remote-control codes is the Sony Control-S protocol, which is used for Sony TVs and includes the following 7-bit binary commands:ButtonCode

1000 0000

2000 0001

3000 0010

4000 0011

Channel up001 0000

Channel down001 0001

Power on001 0101

Power off010 1111

Volume up001 0010

Volume down001 0011

The remote signal includes more than the command for "volume up," though. It carries several chunks of information to the receiving device, including:

• a "start" command
• the command code for "volume up"
• the device address (so the TV knows the data is intended for it)
• a "stop" command (triggered when you release the "volume up" button)

So when you press the "volume up" button on a Sony TV remote, it sends out a series of pulses that looks something like this:

Sony TV remotes use a space-coding method in which the length of the spaces between pulses of light represent a one or a zero.

When the infrared receiver on the TV picks up the signal from the remote and verifies from the address code that it's supposed to carry out this command, it converts the light pulses back into the electrical signal for 001 0010. It then passes this signal to the microprocessor, which goes about increasing the volume. The "stop" command tells the microprocessor it can stop increasing the volume.

Infrared remote controls work well enough to have stuck around for 25 years, but they do have some limitations related to the nature of infrared light. First, infrared remotes have a range of only about 30 feet (10 meters), and they require line-of-sight. This means the infrared signal won't transmit through walls or around corners -- you need a straight line to the device you're trying to control. Also, infrared light is so ubiquitous that interference can be a problem with IR remotes. Just a few everyday infrared-light sources include sunlight, fluorescent bulbs and the human body. To avoid interference caused by other sources of infrared light, the infrared receiver on a TV only responds to a particular wavelength of infrared light, usually 980 nanometers. There are filters on the receiver that block out light at other wavelengths. Still, sunlight can confuse the receiver because it contains infrared light at the 980-nm wavelength. To address this issue, the light from an IR remote control is typically modulated to a frequency not present in sunlight, and the receiver only responds to 980-nm light modulated to that frequency. The system doesn't work perfectly, but it does cut down a great deal on interference.

While infrared remotes are the dominant technology in home-theater applications, there are other niche-specific remotes that work on radio waves instead of light waves. If you have a garage-door opener, for instance, you have an RF remote.

Hope this helped!

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Answer 4

With today's Technology, Pretty Much anything. It just sends a Infer Red signal to the Receiver in the TV that you have and Presses the Command you pushed on the Remote Control. It can have a tough screen on it, it can Channel surf, it can go onto the internet, play games, etc. It all depends on what TV you have. Hope this Helped. :)

Answer 5

A) Insert Batteries B) Press the buttons

Answer 6

Magic.... Its almost like Jesus does it