Kinda cute car

　　According to the routine provided by the training camp, the car has Bluetooth remote control, infrared tracking, ultrasonic obstacle avoidance, PWM speed regulation, and a very good voice module control function. It has two headlights and a turn signal. 5mm direct plug-in full-color LED, you can adjust the color of the turn signal according to your own preferences.
1. Small car owner control core board (Liangshan Pai development board)! [image.png] The main control chip of Liangshan Pai development board is GD32F470ZGT6
with onboard RGB & 8080 screen interface, and also has rich peripheral reference materials, making transplantation more convenient
2. System Power circuit
! [image.png] Mainly uses an SSP7603P50PR LDO. The cost is only about 0.7.
3. Battery power detection and buzzer alarm circuit
! [image.png] ![image.png] The alarm circuit is defective. It has not been modified for the time being.
　4. Car turn signal circuit
! [image.png] I believe many people will not reject the colorful lights.
5. Car lights and system status indication circuit
! [image.png] The car lights use high-bright straw hat lamps. The resistor is also designed to be 100 ohms, which works better when the light is poor and is more practical.
The other two are system status indicators.
6. Bluetooth module
! [image.png] Bluetooth module circuit
The Bluetooth module uses an integrated master-slave HC-05-06-08-02 Bluetooth module, which is the best choice for remote control.
7. Ultrasonic obstacle avoidance
! [image.png] The ultrasonic module uses the HC-SR04 enhanced module, which has more powerful functions.
8. Speech recognition
! [image.png] The speech recognition module uses the ASRPRO module, supports offline self-learning, is economical, accurate in recognition, and highly playable. It is worth buying whether you are developing products or doing DIY.
9. Tracking circuit
! [image.png] Tracking mainly uses the ITR9909, which integrates infrared transmitter and receiver, and cooperates with the LM339 operational amplifier to achieve the tracking function.
10. Motor drive
! [image.png] The motor drive uses the RZR7889 motor drive chip, which has the ability to control the chip to drive the motor table based on the true value to realize various movement directions of the car.
The truth table is as follows, convenient and simple.
![image.png]

The last and most important thing is that I only briefly tested the voice control, and other functions need to be improved. Since the car ran so fast, the wind was too strong to hear what I said, so I could only hold it in my hand. Tested forward and backward on