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Infrared receivers are usually integrated into a single component, forming an integrated receiving system. The signal waveform at the transmitter is restored by demodulating the signal from the circuit. Its transceiver is basically the same as that of a regular diode. Infrared receivers achieve the purpose of transmitting and controlling signals by using wavelengths close to infrared light. Infrared receivers are not only used in industrial settings but also widely in households, such as in remote controls. So, what factors interfere with infrared receivers? If there is pulsating noise in the power supply, it will interfere with the received signal of the infrared receiver. If there is electromagnetic wave noise or optical noise from lighting in the surroundings, it will cause fluctuations in the signal received by the receiver, leading to errors in the received signal. How can these interferences be resolved? For power supply interference, we can design an RC decoupling filter to control it; the effect is good if the exact frequency is known. For circuit wave interference, we can use metal shielding and ground the metal shielded enclosure to block electromagnetic waves and filter out noise. Optical interference is more common, and low-frequency interference from sources such as sunlight and incandescent lamps can be controlled using visible light filters. High-frequency fluorescent lamps such as fluorescent lights can only use the logic gain function to control the interference from high-frequency light sources.