#The7thLiChuangElectricityContest#USB current and voltage meter

 
* 1. Introduction to project functions
Project name: USB current and voltage meter.
Project function: By reading the current and voltage flowing through the USB in real time, the real-time power can be calculated and displayed on the OLED screen.
Experience of participating in this training camp: First of all, I would like to thank the LiChuang platform for providing such an opportunity and providing financial and technical support. I also wish LiChuang can keep its original aspirations and do better and better (students want to get it for free). Participating in this training camp has stimulated my interest in electronics, and I finally understand that once you get into electronics, it's like a deep sea. I learned a lot of circuit knowledge in this project, and also asked a lot of questions to the big guys in the communication group. I benefited a lot, and I will come back next time.
*2. Project attributes
This project was made with reference to the LiChuang open source project and was first released on the LiChuang open source platform
 
* 3. Open source agreement
GPL 3.0
 
 
 
*4.
The schematic diagram of the hardware part was mainly modified with reference to the LiChuang tutorial, and some errors were corrected and the external crystal oscillator was omitted.
For specific parts, please refer to the official video of LiChuang B station.
Note: The key lies in the current sampling circuit, which is prone to errors. Try to understand the sampling principle to avoid errors. Then it is welding. Because there are not many tools at home, the MCU has been connected to tin. Fortunately, I bought two pieces and finally soldered them with tin paste.
 
 
*5. Software part
 
*6. BOM list
 
*7. Competition LOGO verification
* 8. Demonstrate your project and record it into a video and upload it
#LiChuang Training Camp#LiChuang yyds, it is another day of gaining knowledge and tin absorption. The work has been open sourced to the LiChuang open source hardware platform OSHWHub_哔哩哔哩_bilibili