Remote control car circuit diagram
Working principle: The attached picture is the working principle diagram. IC1 is an infrared receiving head, usually the {3} pin of IC1 outputs a high level, and when receiving an infrared signal from the remote controller, the {3} pin outputs a low level. Code identification is not used here. The remote control can use remote controls for color TV, VCD, VCR, DVD, etc.
Device selection and fabrication: See the note for component selection. The car can be selected as an ordinary toy car with a 3V motor. It is better to buy a larger one, which is easy to install. The battery uses 4 rechargeable batteries of size 7, tied with tape, and then fixed on the car. The infrared receiver head is fixed at the highest point of the car in order to improve the receiving sensitivity. IC3 can also use sound circuits such as machine gun sounds and car horn sounds.
Only the Q0 terminal of IC2 is high, and the car stops. Press the remote control, the infrared receiver will receive the infrared remote control signal, and the digital signal output from pin {3} will be smoothed to low level by C1, BG1 will be cut off, and the {14} pin of IC2 will change to high level, which is equivalent to input With a positive pulse, the Q1 terminal becomes a high level, and BG2 is turned on through D1 and R4. IC3 is a siren music integrated circuit. Its positive electrode is connected to the trigger pole. After BG2 is turned on, IC3 is powered and the signal is amplified by BG3 to make the speaker emit a loud siren sound. Press the remote controller again, the Q2 terminal of IC2 is high level, IC3 continues to work through D2, the speaker continues to sound, and BG7, BG6 and BG8 are saturated and turned on through R6, the motor rotates forward, and the car moves forward. Press the remote control for the third time, the Q3 terminal of IC2 outputs a high level, and BG5 is turned on through D3 and R5, and the language circuit IC4 is powered on.
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