#The 7th Lichuang Electric Competition#USB Ammeter W

This project uses the professional version of EasyEDA to draw the circuit board, and JialiChuang to make the board. The MCU uses the N32G430C8L7 microcontroller from National Technology, which is very similar to the STM32F103C8T6, easy to learn and easy to use. The current detection uses the INA199 shunt monitor, and the voltage detection uses the voltage divider circuit measurement. The display device uses a 0.91-inch OLED display and transmits data through the I²C bus.
 
Use a heating plate and low-temperature lead-free solder paste to solder the components, and use flux paste to adjust the amount of attached solder. After soldering, use an organic solvent to scrub the surface.
After completing the welding work, use an electric meter to make simple measurements, troubleshoot problems, and light up normally before implementing the functional program.
 
Use Keil MDK5 to burn the program through the SW protocol.
 
I originally planned to use FM8002A to implement the sound function, but it could not be realized due to design errors. The modified project has not yet been verified in person. School is about to start, and the rest will be made up later