It is applicable to Midea air conditioner all-purpose remote control, which can be directly used by the central air conditioner without hanging machine

It is applicable to Midea air conditioner all-purpose remote control, which can be directly used by the central air conditioner without hanging machine

Why can infrared remote control control household appliances?

First of all, in the infrared part, the infrared remote controller uses infrared led diodes. The wavelength of infrared emission tube is usually between 850 nm and 980 nm. Considering that it is not necessary to use high power and observe the phenomenon of red explosion, the infrared diode in the 940nm home infrared remote control seems to be uniform. The infrared receiving diode is also customized for such wavelengths. Therefore, the transmission and reception of infrared signals are not hindered in wavelength.

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The second is the coding method. In the initial stage, the infrared remote control is very simple and has no number. For example, the ultrasonic principle remote control, pinch, and so on. "Squeeze" suddenly, the light turns on, then pinch, and then pinch, and the "Squeeze" light turns off. The corresponding action is simple but easy to be disturbed. For infrared remote control, there are many natural sources of infrared ray in nature, which will cause operation errors. At this time, the infrared pulse output by the infrared remote controller is encoded and decoded at the receiving end,

It can effectively avoid operating errors and set different numbers to correspond to different operating actions.

Here, we have to talk about the problem of numbering equipment. Now integrated. The infrared remote controller has a variety of numbered chips, such as M50462AP.TC9012F011.SAA3010T.UPD1986C, etc. Remote controllers using the same chip can be used with each other. Let's take a look at color TV remote controls, such as M50462AP chip and processor M50436-560SP. These remote controls can be converted to various televisions.

In addition, the universal infrared remote controller has different kinds of chip coding methods built in. Just like the password book, you can choose different coding methods for testing until you select the corresponding number, and you can remotely specify the electrical appliance; The learning remote control needs to aim the original remote control at the launch port of the learning remote control, and install a receiver at its launch port. When the infrared code of the original remote control is received, record, copy and store it so that the remote control code recorded can be recovered and transmitted by pressing the specified button after learning, and then play the same role as the original remote control

The same function is equivalent to a "repeater"?

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However, there is another situation. Although the number of digits can reach 32, the binary code is long and short. Due to the limitation of the number of digits, although different number chips are used, only a few buttons of the two remote controls may have the same number. Assuming that the number of this remote control is very short or simple, the more likely it is to be repeated. The "power on key" is right with another remote control. If the "volume key" has the same number, the remote control can control a certain action of another appliance. You can notice this when you try to use the infrared remote control.

These concepts can be extended to other one-way remote controls, which is a common reason. The remote control command is repeated, or the chips of the same type are basically the same