[Lichuang Development Board] Liangzai’s smart "zhang" car

#### 1. Project Introduction
Based on the GD32 Liangshan School’s smart wheat wheel car, it has functions such as Bluetooth remote control, tracking, obstacle avoidance, low battery reminder, 4G control, and follow.
#### 2. Function introduction
##### 1. The power supply
is powered by two 14500 batteries, providing 7.4V voltage, and the SSP7603P50PR linear voltage regulator provides 5V stable voltage. The circuit diagram is as follows.
![({TP55KEJO5S63GINP(X%BJ.png] ##### 2. Buzzer
When the voltage is too low and an obstacle is encountered, the microcontroller will provide a high level to make the buzzer sound to remind the user in time Charging and paying attention to the smart car.
![image.png] ##### 3. The ADC
uses the 12-bit ADC in GD32 to collect the power supply voltage and pay attention to the battery health in real time
! [image.png] ##### 4. Motor. The driver
uses four RZ7889 to drive the N20 motor.
![image.png] ##### 5. The tracking module
adopts an infrared tracking scheme, and the tracking sensitivity can be changed by adjusting the sliding resistor . ## The 6.4G module uses the Hezhou 780E 4G module as the communication module. It is currently in the testing stage and will be added later! [image.png] ##### 7. The motor uses an N20 motor with a shaft length of 9.3mm and a rated speed. 60 rpm, slow speed, friends who pursue high speed can buy a faster speed motor. Purchase link: [https://detail.tmall.com/item.htm?_u=p3nqr2vv442a&id=654459466574&spm=a1z09.2.0.0.570 . f2e8dEGZBVp](https://detail.tmall.com/item.htm?_u=p3nqr2vv442a&id=654459466574&spm=a1z09.2.0.0.570f2e8dEGZBVp) ![image.png] ##### 8. The wheels use 52mm wheat wheels, which can Achieve left and right translation, forward, left and right rotation and other functions ![image.png] #### 3. Physical display ![image.png] ![image.png]