Common Classification and Coding Methods of Remote Control

 The common classifications of remote controls in our lives are:

Infrared remote control (IR)

Wireless remote control (RF)

Infrared remote control (IR Remote Control) is a remote control device that uses near-infrared rays with a wavelength between 0.76 and 1.5 μm to transmit control signals.

A radio remote control (RF Remote Control) is a remote control device that uses radio signals to control various institutions in the distance.

Several common encoding methods for wireless remote control:

1. Fixed code: The coding capacity of the fixed code is only 6561, and the probability of repeated codes is extremely high. The code value can be connected by solder joints. The formula is seen, or it is obtained by using a "code detector" at the scene of use, so it is not confidential, and is mainly used for confidentiality. Occasions with lower sexual requirements, because of its lower price, has also been widely used. Common chips are 2260, 2262, 5326, etc.

2. Learning code: The learning code has a large coding capacity, built-in one million sets of codes, the probability of repetition is low, the code is easy to match, and it has a learning memory. The storage function does not require the use of a soldering iron, and the code can be matched at the user site with a high degree of flexibility in use. Common learning code core are 1527, 2240, HT6P20D and so on.

3. Rolling code: Rolling code is a kind of strong confidentiality, the code is automatically changed after each transmission, and others cannot use the "code detector" to obtain an encoding of the address code. The different codes of the rolling code remote control can reach hundreds of millions. The common chips are HCS301, HCS300, HCS101 and so on.

4. Copy code: Copy code is a coding method for writing programs with a single-chip microcomputer, and has the function of copying other coded remote controls.