IR Remote Control - Working & Its Applications

(InfraRed remote control) A portable, wireless the device that uses light signals in the infrared (IR) range to control audio, video, and other electronic equipment inside a room.
Early in the 1990s, the first remote controllers were created, and these early remotes were wired to gadgets.
Today’s remote controls use infrared control, which allows them to operate several devices simultaneously. In addition to being utilized for entertainment, remote controls are also used for business, military purposes, and leisure. In the late 1970s, infrared remote controls were created.
A the transmitter at one end of an infrared (IR) remote control sends light signals to a receiver inside another electronic device.
These gadgets range from TVs to stereos to DVD players to gaming consoles and more. An IR remote control works by transmitting commands too distant electronic equipment using a bulb or set of bulbs that emit invisible (infrared) light.
There are various IR remote control models, ranging in price from the least expensive with just one IR transmitter to more expensive models with multiple IR transmitters. IR remote-compatible electronics include front-mounted sensors that can recognize infrared light and interpret the commands.

Block Diagram of Infrared Remote Control Switch

A transmitter section and another reception section make up the block diagram of an IR remote switch. The receiver section is linked to any load while the transmitter section operates like a standard remote control. This remote control switch’s primary the purpose is to control any load, like a TV, fan, radio, light, etc.
There is only one switch in this circuit that controls the transmitter. This switch can be used to turn on or off the TV, radio, and household appliances. The control circuit can even be used to regulate the volume of radio, TV, and many other appliances by adding additional circuitry to the real remote.

A NE555 timer and infrared LEDs are located in the transmitter part. The NE555 timer is set up in a stable mode, and the power source—a 9V battery and concave lens—directs the IR rays toward the infrared LEDs. A major component of the transmitter part is a switch; when it is closed, the battery’s power is turned on, the 555 timer
functions as a steady multi-vibrator, and its output is connected to the input of the IR LEDs. The IR beam is then produced by the infrared LEDs as they rise through the concave lens.
The infrared LEDs in the transmitter section create an IR beam that is focused on the reception section. The IR beam is detected by the photo LEDs, which then charge a capacitor to raise the input voltage at one
pin of the op-amp and produce a high output. The 4018 counter receives the output of the op-amp as an input, and the counter then drives the load through a relay to turn on or off.

Infrared remote control switches are used to control multiple things like thyristor power control, TVs, video games, Space related equipment (NASA), etc.
The IR remote control switch can also be used to turn on or off electronic devices like TVs, radios, and washing machines.
By using the comparative relays we can switch ON or OFF the motor appliances also.