As shown in the figure, IC1 is an infrared receiver. Usually, the {3} pin of IC1 outputs a high level. When receiving an infrared signal from the remote controller, the {3} pin outputs a low level. Code recognition is not used here, and the remote control can use a remote control such as a color TV, a VCD, a video recorder, or a DVD. The component selection is shown in the figure. The car can be selected as a general toy car with a 3V motor. It is better to buy a bigger one, which is convenient for installation. The battery uses four 7-cell rechargeable batteries, which are bundled with tape and then fixed in the car. The infrared receiver is fixed at the top of the car to improve reception sensitivity. IC3 can also use sound circuits such as machine gun sounds and car horn sounds. UV Film,UV Screen Protector,UV Curing Screen Protector Shenzhen Jianjiantong Technology Co., Ltd. , https://www.jjttpucuttingplotter.com
IC2 only has a high level at Q0, and the car stops moving. Press the remote control, the infrared receiver receives the infrared remote control signal, and its {3} pin output digital signal is smoothed to a low level by C1, BG1 is cut off, and the {14} pin of IC2 is abruptly high, equivalent to the input. A positive pulse, the Q1 terminal becomes a high level, and BG2 is turned on via D1 and R4. IC3 is a siren music integrated circuit. Its positive pole and trigger pole are connected together. After BG2 is turned on, IC3 is powered, and the signal is amplified by BG3 to make the speaker emit a loud siren. Press the remote control again, the Q2 end of IC2 is high level, the IC3 continues to work through D2, the speaker continues to sound, and the BG7, BG6 and BG8 are saturated and turned on by R6, the motor rotates forward and the car advances. Pressing the remote control for the third time, the Q3 terminal of IC2 outputs a high level, and B3 is turned on by D3 and R5, and the language circuit IC4 is energized. 