Liangshan School Cart

This project uses the GD32F470ZGT6 as the main control chip, which can realize functions such as infrared tracking, servo ultrasonic ranging and following, Bluetooth remote control, wireless control, light tracking, temperature and humidity detection, CAN communication, and AD sampling. It's essentially expanded into a development board in the form of a smart car, facilitating the learning and use of related peripherals of this chip (common peripherals such as UART, IIC, SPI, and CAN). 1. Power Supply Section: This design considers both functionality and cost, so the appearance is not very aesthetically pleasing; I cut off the rear of the car (oops... hence the battery holder is partially unsupported). The power supply is sourced locally. The company's products commonly use two types of batteries: 6V and 3.6V, which are readily available. The servo motor and N20 motor can both operate at 6V, while the Liangshanpai development board requires a 5V power supply. The 6V supply can be met by stepping down the voltage with an LDO, and the small voltage drop results in much lower power consumption. Here, the LM39100S-5.0 LDO is used. It should be noted that the smaller the voltage drop of the LDO, the better, as this reduces the power wasted in the LDO. Of course, the voltage drop cannot be less than the chip's minimum voltage drop (as shown in the figure, a voltage drop of 630mV can provide 1A of current, which means it can provide 1A of current for the car, excluding the servo motor and N20 motor). The main power consumption of the car includes the MCU (generally less than 250mA), Bluetooth module (150mA), CAN module (50mA), temperature and humidity module (50mA), wireless module (100mA), infrared module (100mA), etc.