Intelligent remote control car based on Liangshan School

1. Project Introduction
The first project of my personal design, refer to the official project case design: LiChuang Liangshan School-Smart Car Expansion Board
 
2. Function Introduction
Function: Ultrasonic obstacle avoidance, two-way infrared tracking, wireless remote control (Bluetooth module, 2.4G module), color lights, active buzzer alarm.
The three functions of Bluetooth remote control, tracking obstacle avoidance, and 2.4G remote control can be switched in a cycle through the key switch.
Top view:
Bottom view:
Circuit analysis:
Tracking circuit:
Infrared sensor: TCRT5000, variable resistor: 3296W top adjustment potentiometer, comparator: LM393 dual voltage comparator
uses a simple two-way infrared tracking to realize the basic tracking function. The digital signal output after comparison by the tracking circuit is input to GD32F450ZGT6 to realize the black line detection function.
Motor drive circuit:
Drive chip: RZ7889
controls the forward and reverse rotation of the motor by inputting high and low levels to BI and FI to realize the positive and negative output currents of BO and FO.
Buzzer drive circuit:
The model and drive voltage of the buzzer can be selected according to your preferences.
The chip output high level trigger method is used to realize the on and off of the NPN transistor to turn on the buzzer.
Power input circuit:
Linear regulator (LDO): HE6250MPR
realizes the step-down and voltage regulation function of two series-connected 18650 batteries to drive the normal operation of the main control chip and other circuits.
Ultrasonic module: HY-SRF05
Car light module: 5050RGB full-color module
Bluetooth module: HC-05
Remote control receiver: 2.4G module
 
III. Function demonstration