【LiChuang Development Board】Intelligent remote control car

**Project Introduction:**
This is an intelligent remote control car based on the **LiChuang development board**, with GD32F450ZGT6 as the main control.
**Circuit Design:**
Peripheral circuit design, based on the Liangshan School core board, a **power supply voltage regulator circuit** is added to reduce the external 7.4V power supply to 5V and 3.3V. **Motor drive circuit**, in order to reduce costs, the RZ7899 motor drive chip is used. **Five-way infrared tracking circuit**. The voltage acquisition circuit uses three 10K resistors in series and is connected to the ADC acquisition pin of GD32. Two **independent buttons** are added to facilitate the subsequent switching of tracking and remote control functions. There are also left and right lights, reversing lights and a buzzer, and interfaces for NRF24L01 wireless RF module, Bluetooth module, ultrasonic ranging module and OLED display module are reserved.
When soldering the front-end tracking circuit board, I accidentally scrapped the board. The components were just used up and I had to use the previous modules to assemble them. It did not affect the normal function, but it was more painful when soldering the perforated board. The two boards are connected with pin headers, or you can directly connect the two boards with a row of bent pins. I used two 18650 batteries in series. There are connection holes on both boards. Use copper pillars to connect a front board. The battery box is directly inserted between the two boards, which is quite secure, so there is no need to glue it.
**Code and software:**
The code design is relatively simple, which is included in the attachment below. This is the first version used to test the hardware. Only some basic functions are designed for the time being, and the rest are being improved. The remote control function can be realized by Bluetooth communication or by using a 2.4G wireless radio frequency module. There is a 2.4G module interface reserved on the board. You can draw another remote control board. I first used the remote control made in another project.
![35B30ABFF43F5DC674CF2BA4F97B1E8A.jpg] In the Bluetooth remote control mode, you need to use a Bluetooth serial port software to realize the communication between the mobile phone and the Bluetooth module. In the software, you can set the keyboard button to send fixed characters.
![0EFF573B1ADCB24768B2F2BF96C27787.jpg] ![Screenshot_2023-02-20-17-22-23-242_com.shenyaocn.android.BlueSPP-edit.jpg] Actual picture:
![Cover.jpg] ![9BD58FDBA9514BD38FAF6D0059C81D1E.jpg] ![B972A2779143A2F2388553C52DFEA89D.jpg] ![AD44ED7F0C1AE614377485E2C2A25042.jpg]