Infrared delay lighting switch

KA2184 is an infrared receiving integrated circuit produced in South Korea. Its performance, parameters and pin functions are exactly the same as CX20106 and can be used directly interchangeably. Since this circuit adopts an infrared reflective circuit structure, the infrared transmitter and receiver need to be installed in the same place. In the same plane in the direction, this requires the transmitter and receiver to be integrated and powered by the same power supply. This working mode is also suitable for the circuit's long-term standby and short-time working conditions. In this circuit, a multivibrator composed of NE555 circuit is used as the drive circuit of the infrared transmitter.