#The7thLiChuangElectricityContest#JiaLiChuangSummer Training Camp 2022

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* 1. Project function introduction
This is a USB power meter, which uses the National Technology N32G430 series chip as the main control and can measure voltages of about 5V
 
* 2. Project attributes This
is the first time that the board I drew is made public, and I drew it following the official example
 
* 4. The hardware part
uses the National Technology N32G430 series chip as the main control, which is responsible for sampling voltage and current, performing simple power consumption calculations and driving the 0.91-inch OLED.
The current sampling part uses the INA199 chip, and the sampling resistance is 10mΩ. The current I can measure is about 2.2A.
It is drawn using the EasyEDA standard. If you want to add functions and shells later, you will switch to the professional version.
* 5. Software part
The software part uses Keil5 for programming, mainly referring to the official EasyDone of National Technology. Because the OLED connection is different from the official example, I2C is modified in the program.
* 6. BOM list
Except for the screen, which was not bought at EasyDone, all other components were bought at EasyDone Mall, which is very cheap and easy to use. *7. I forgot to print
the competition LOGO verification PCB. I will print it on the second version next time. The engineering PCB has the competition logo added!! * 8. Demonstrate your project and record it as a video to upload . I haven’t recorded the video yet because I just started college and have a lot of things to do. I can only record it later.