Remote control secrets. This is how do they work

   

Nowadays, every one using remote control systems for various Devices like TVs, Fans, ACs etc. Remote control is a small, usually hand-held, electronic device. It is used to control other devices. Remote controls commonly operates via infrared signals but sometimes by radio frequency signals

  

  How remote controls work?

  Have you ever seen old films where people are communicating messages by flashing lights at each other? that's a mores code. TV remote controls also work in a similar way. but they use infrared light, in short IR. The remote control has an LED light in it. The LED light flashes really quickly to and sends signals to the TV about some instruction. After receiving this commanding message, TV works according to that. Here the remote is a transmitter, and the TV is a receiver. I think you understood how remotes work. So, now lets understand the types of Remotes.

  There are two main types of remote controls: infrared (IR) and radio frequency (RF):

 IR remote controls work by sending pulses of infrared light to a device. Infrared light is invisible to the human eye, but it can be seen by cameras and other devices that are sensitive to infrared light. When you press a button on an IR remote control, it sends a specific pattern of infrared pulses to the device. The device has a sensor that can detect these pulses and interpret them as commands. For example, the command to turn on the TV might be a series of three short pulses followed by one long pulse.

  RF remote controls work by sending radio waves to a device. Radio waves are a form of electromagnetic radiation that can travel through walls and around corners. When you press a button on an RF remote control, it sends a specific radio signal to the device. The device has a receiver that can detect these signals and interpret them as commands. For example, the command to turn on the TV might be a specific radio frequency that is unique to the TV.

  IR remote controls are more common than RF remote controls because they are cheaper to make. However, IR remote controls have a shorter range than RF remote controls. This is because infrared light is easily absorbed by walls and other objects. RF remote controls can typically be used from up to 100 feet away.

  Both IR and RF remote controls use a type of technology called digital signal processing (DSP) to generate the signals that are sent to the device. DSP is a type of computer programming that can be used to manipulate digital signals. In the case of remote controls, DSP is used to create the specific patterns of pulses or radio waves that are used to control the device.

  Remote controls are a convenient way to control devices without having to get up and walk over to them. They are used with a wide variety of devices, including TVs, stereos, DVD players, cable boxes, and more.