#The 7th LiChuang Electric Competition# Ammeter based on LiChuang training camp

Note: * is a required field,
please fill it in during the registration stage↓
 
* 1. Introduction to project functions
  The USB ammeter reproduced based on the LiChuang Electric Race Training Camp and the National Technology Teaching Support
can detect the voltage and current within 5V2A, and display the real-time voltage, current and power through the OLED in real time.
1. Combined with the National Technology & teaching video, draw the PCB board, but cancel the crystal oscillator.
2. Design the circuit to detect the current, open the window of the current line and tin it (learn new knowledge through the feedback of Mr. Liu)
 
Note: The theme is not limited, it can be a solution to a problem in life/work, a solution designed for a certain group of people/scenes, a graduation project/course design/DIY project/purely cool project, etc. Mainly talk about what problem you solved by what means.
 
*2. Project attributes
are based on the free track of the Lichuang Electronic Design Competition. I. Lichuang summer training camp and source open source engineering files.
The project content includes:
1. According to the project requirements, combine the complete tutorials and learning materials provided by Lichuang and the support of national technology to select components.
2. According to the selected schematic diagram, try to layout the components (the following points should be considered)
  2.1 The layout process can use automatic wiring to verify the rationality of the layout and the difficulty of implementation.
  2.2 The difficulty of routing after layout
  2.3 The difficulty of welding after layout and how to install with the USB public shell
3. PCB routing, considering the current peak value of 2A, it is necessary to set VCC, detect the line width of the current and the line width of the 3.3V power line
 
 
 
Note: Please indicate whether the project is open to the public for the first time; whether the project is original; whether the project has won awards in other competitions, if so, describe the details of the award; whether the project has participated in the defense at school.
 
* 3.
Please enter the content of the open source agreement...
 
Note: Altruism is self-interest, please read the following content carefully.
Embrace open source and give unlimited value to the project. It is recommended that more than 80% of the core functions of the project be open source;
if a part of the function is irreplaceable and the project cannot solve the corresponding problem after deleting it, then the function implemented by this part is the core function of the project; for example, if an electronic load is designed and a host computer software is designed to monitor power changes, then the electronic load is the core function and the host computer software is an auxiliary function; for example, an isolated 485 module is used in the electronic load to communicate with the host computer, then the communication function implemented by this 485 module is an auxiliary function;
the project should choose an open source protocol that suits it. If the project references other open source projects, the source should be indicated and the open source protocol of the original author should be followed; the original project is recommended to use the GPL3.0 open source protocol;
the functions implemented by directly referencing the original circuit or original code of the open source project cannot be used as the core functions of your own project, and the functions directly implemented by using general modules on the market cannot be used as the core functions of your own project.
 
Please fill in the following in the competition stage↓
 
*4. Hardware part
The hardware part is roughly classified according to the schematic diagram
1. The main control circuit
VDD, VSS is connected to the capacitor to keep the voltage stable, because the voltage of the capacitor does not change suddenly.
2. Power step-down circuit
3. Reset circuit
4. Serial port debugging circuit
Use ST-LINK/V2 for debugging
5. Voltage sampling
6. Current sampling
7. BOOT selection
Note: It is recommended to use Jiali Chuang EDA. If you choose other EDA tools, please upload the schematic diagram in PDF format, the PCB drawing in PDF format, and the PCB file in Gerber format in the attachment. Here you can explain in detail the implementation principle and mechanism of your project, precautions, debugging methods, testing methods, etc. It is recommended to introduce your ideas to others in the form of pictures and texts.
 
*5. Software part
Through the software design in the teaching video of Li Chuang Training Camp, build the development environment of N32430 in Keil, import the Pack package, and learn by referring to the source code.
However, due to the chip welding failure, the chip tinning problem was not handled properly twice, which caused the 3.3V and GND tinning to cause a short circuit, and the power-on detection could not be performed, so the software part design could not be carried out
 
 
*6. BOM list
BOM list details see Attachment X
 
 
 
*7. Competition LOGO verification
 
 
* 8. Demonstrate your project and record it into a video and
upload it. Please see Attachment 5 for video recording details.
Video requirements: Please shoot horizontally, with a resolution of no less than 1280×720, in Mp4/Mov format, and a single video size limited to 100M;
Video title: Lichuang Electric Race: {Project Name}-{Video Module Name}; For example, Lichuang Electric Race: "Autonomous Driving"-Team Introduction.
 
More details: https://diy.szlcsc.com/posts/d76d9cb41705430e9a54e7a5feed07a5