Does Apple have an infrared remote control?

Apple's mobile phone has no infrared function, only Bluetooth function. The infrared function is actually just a transitional function, which has been replaced by Bluetooth.

Iphone has infrared distance sensing, but it can't transmit data, so it can't use infrared remote control. According to different types of remote controllers, the remote control distance will vary greatly. General household remote controllers are divided into infrared remote controllers, and the effective distance is generally 8 to 10 meter. The effective distance of Bluetooth remote controller is similar, but it is not affected by obstacles.

The so-called infrared ray refers to electromagnetic radiation whose wavelength exceeds red visible light. Mobile phone infrared can be wirelessly connected with computers or other mobile phones, provided that both parties have infrared. To turn on the infrared function when using the mobile phone, the computer will automatically search for signals near the infrared port of the computer. If successful, an infrared connection sign will appear on the system tray. Then you can send the information to your mobile phone.

The principle of infrared remote control:

The remote controller consists of infrared receiving and transmitting circuit, signal conditioning circuit and central controller 803 1. Program and data memory, keyboard and status indicating circuit.

When the remote controller is in the learning state, the infrared receiving circuit starts to receive external infrared signals every time the user presses the control key.

At the same time, it is converted into an electrical signal, then it is detected, shaped and amplified, and then it is sampled periodically by CPU, and the binary data of each sampling point is stored in the designated storage unit in units of 8 bits, so as to control the equipment in the future.

When the remote controller is in the control state, whenever the user presses the control key, the CPU reads a series of binary data from the designated storage unit and outputs it serially (the time interval between bits is equal to the time interval when sampling) to the signal holding circuit.

At the same time, the signal is modulated by the modulation circuit, and the modulated signal is amplified and transmitted by the infrared emitting diode, thus controlling the functions of the equipment corresponding to the keys.

Baidu encyclopedia-infrared remote control