Infrared Receiver

Infrared receiving head is an integrated receiver composed of infrared receiving tube and amplifier circuit. The amplifier circuit is generally composed of a collection of blocks and multiple resistance capacitors, and it needs to be packaged in a metal material shielding box. Therefore, the circuit is very complicated, but the volume is small. Generally speaking, there are two ways to distinguish infrared receiving head pins: 1. 蕞 Simple is to allow infrared receiving head suppliers to provide model specifications. Customers can distinguish the pins of infrared receiving head according to the specification book; 2. It is a multimeter test testing The resistance of the two pins, find one with a small resistance value in the two pins. Do not move the pen. The red table is connected with VCC and the black tablet. The other pin is the signal pin. The three pins of the infrared receiving head are GND, VCC, OUT 3 pins, each of which is ground, power and signal output. The models of infrared receiving heads are different, and their pins are different. The gain of the internal amplifier inside the infrared receiver is very large, and it is very easy to cause interference. Therefore. Infrared receiving head: Infrared receiving heads are generally receiving, amplifying, and demodulation heads. Generally“0”and“1”The difference is usually reflected in the length of the level or the signal cycle. When the single -chip microcomputer decodes, the receiving header output foot is usually connected to the external interrupt of the single -chip microcomputer. The top priority is to find data“0”and“1”The difference between waveforms. The output end can be connected to the CMOS and TTL power supply circuits. This kind of receiving head is generally used in household appliances such as air conditioners, TVs, VCDs.