【LiChuang Development Board】Smart Car

This is a GD32-based car that I made during the winter vacation training camp of LiChuang. The car has the functions of headlights, buzzer, ultrasonic obstacle avoidance, Bluetooth remote control, and automatic tracking.

![Power.png] Note that the positive and negative frames in the power supply are external batteries. The 18650 battery socket 2 nodes can be charged with 18650 lithium batteries and chargers. The chip used in the power supply is HE6250MPR. If you don't want to use this chip, you can change it according to other chip data sheets.

Then there are LED and button circuits and buzzers. You can change the ports and control methods according to the schematic diagram. I won't put the pictures here.

![Motor control.png] The motor control uses RZ7889, and the motor uses N20 reduction motor 3v1000 rpm. Remember to buy the N20 fixing bracket.

![Tracing circuit.png] Tracing uses LM393 chip and ITR9909 infrared pair tube, because the chip can control two infrared channels, I used 5 channels so I used three chips, this can be changed according to your own needs

. Bluetooth and ultrasonic both use modules, and the reserved pins are used to connect the Bluetooth HC-06 slave and the ultrasonic HC-SR04. If you don't have these modules and chips, you can buy them from Taobao or Pinduoduo.

The code mainly has two modes, tracking and control, which are separated by reading LED_S and LED_M. There is also an automatic obstacle avoidance mode, which can be turned on on the host computer, but the other two modes cannot be used when using this mode. You have to restart the machine, haha, because it is trapped in the loop, you can also change it.

These are the main ones, and the appearance can be designed by yourself.

Picture display
![1.jpg] ![2.jpg] ![3.jpg] ![4.jpg] ![5.jpg] The code, host computer and demonstration video are in the attachment