IC1 chip is an integrated circuit, is an integrated infrared receiver (TV, DVD player used), it will infrared receiving diode, amplification, demodulation and other circuits integrated together, only three pins.
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It can directly demodulate the signal sent by the infrared remote control to the digital signal, and then output, its signal output end is connected to the MCU P3.2, that is, INT0 interrupt foot.
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The program is set to generate an interrupt when the infrared pulse falls along the edge. Multiple receiving heads in parallel can be installed in different rooms to ensure that remote control signals can be received in each room to achieve load control. multi-point Control. Remote control is a device used to remotely control machinery. Modern remote controls are mainly composed of integrated circuit boards and buttons used to generate different messages. The main component of the transmitting part of the remote control is the infrared light-emitting diode. In fact, it is a special light-emitting diode, because its internal material is different from ordinary light-emitting diodes, so when a certain voltage is applied at both ends, it emits infrared rather than visible light.
IC1 is an integrated circuit, FL52C-2 is a print model sometimes representing a manufacturer or something!