Remote control receiving circuit of Panasonic inverter air conditioner indoor unit control circuit

Shown is the remote control receiving circuit of the indoor unit control circuit of Panasonic inverter air conditioner . This circuit is a dedicated infrared remote control receiving integrated circuit (LcPC2800AGR). The infrared photodiode is connected to pin ⑧ of the integrated circuit.     When the infrared light signal from the remote control shines on the photodiode, the photodiode turns the light signal into an electrical signal and sends it to the ⑧ pin of the integrated circuit. It is amplified, filtered and shaped in the integrated circuit, and the ② pin outputs the control signal. It is sent to the pin @ of the microprocessor of the indoor unit through the interface . After receiving the remote control signal, the microprocessor controls each component according to the program. The ① pin of the remote control receiving circuit is the power supply terminal (+5 V), and the ⑤ pin is the ground terminal. @ pin is the filter capacitor.