The remote control switch should be similar to the remote control socket. The infrared remote control socket is mainly composed of three parts: power supply, infrared receiving and socket power on and off control. After the mains is connected, the alternating current is current limited, rectified, filtered, and stabilized to obtain a DC voltage of 10V. One channel of this voltage is added to the positive electrode of the red light-emitting diode, and the other channel is further reduced. After filtering by the capacitor, an operating voltage of about 5V is obtained. This voltage passes through an adjustable capacitor to filter out high-frequency interference and then is sent to the pin of LM358P. When the remote control controls the buttons, the infrared rays emitted by the remote control are received by the infrared ray receiving diode and converted into electrical signals, which are sent to the inside of the IC. After shaping, amplification and decoding, a set of negative pulse signals are output, causing the intermediate relay coil to receive electricity. When it is closed, the electrical appliances on the socket are powered, the triode connected to the light-emitting diode is turned on, and the diode lights up and maintains this state. If you press the remote control button again, the electrical appliances on the socket will stop working.

Infrared circuit found on Baidu