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With the development of science and technology, the technology of wireless remote control is becoming more and more mature. IP and RF is also widely used in many industries. However, many people cannot distinguish between IR and RF. Therefore, in this blog, we will mainly discuss the difference between the two.

Principle of wireless remote control

The radio remote control is a remote control device that uses radio signals to control various institutions in the distance. Commonly used radio remote control systems are generally divided into two parts: transmitting and receiving.

• The transmitting part is generally divided into two types, namely the remote control and the transmitting module.

• Generally speaking, the receiving part is also divided into two types, namely super heterodyne and super regenerative receiving methods. The super regenerative demodulation circuit is also called the super regenerative detection circuit, which is actually a regenerative detection circuit that works under intermittent oscillation. The superheterodyne demodulation circuit is the same as the superheterodyne radio. It sets a local oscillator circuit to generate an oscillating signal, which is mixed with the received carrier frequency signal to obtain an intermediate frequency signal, which is amplified and detected by the intermediate frequency to demodulate Data signal.

How do IR and RF work?

There are two common types of wireless remote controls, one is the IR remote control commonly used in home appliances, and the other is the RF remote control commonly used in anti-theft alarm devices, remote control of doors and windows, and car remote control. The principle of wireless remote control is that the transmitter encodes the controlled electrical signal first, and then modulates it. Infrared modulation or wireless frequency modulation and amplitude modulation are converted into wireless signals for transmission. The receiver receives the information-carrying radio wave, amplifies, decodes, and obtains the original control electrical signal. The electrical signal is then power-amplified to drive related electrical components to realize wireless remote control.

What is the difference between IR and RF?

RF (also known as "radio frequency") and IR (for "infrared") are two types of energy used in remote controls to convey commands. RF uses radio waves, while IR is a type of light that cannot be seen by the naked eye.

Many people may not know what kind of remote control they are holding. As long as it works, few people care. But if you are curious, the easiest way to judge is whether you need to point the remote control directly at the device you want to control. Your TV remote is IR. Your garage door is RF.

Each of these two technologies has advantages and disadvantages. IR is fast, efficient, and provides the ability to communicate various commands. Its disadvantage is that you always need sight to work properly. If there is any obstacle, you will sink. It is also suitable for relatively short distances. The size of a room is as much as you expect.

On the other hand, RF can work over longer distances. You can be on your street and still open your garage. Some high-end remote control vehicles may be far away from their radio frequency control devices. RF can also pass through solid walls-as long as they are not metal. However, the transmission mode of RF is not as complicated as IR, so the command must be simpler, such as switch; up, down; on, off.

Since the RF data payload is very small, the manufacturing cost of the components will eventually be reduced. You can find them in common equipment such as ceiling fans and garage doors: the commands don’t need to be complicated, and RF can increase the range while reducing the overall cost.

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