An open-source intelligent electronic load based on CH32V307, an embedded systems competition entry.

This is an open-source intelligent electronic load based on the CH32V307VCT6, an embedded systems competition entry. It includes schematics, PCB layout, source code, and a project report. It
was a National Second-Level entry in the 2023 Embedded Chip and System Design Competition, application track.
It was modified from a previous Holtek version of the electronic load, ported to the CH32 microcontroller, and uses the RT-Thread system. Some code optimizations were made. It was rushed and is not very good; please don't criticize too harshly.
Demo video: https://www.bilibili.com/video/BV1Zu4y1m7Zd/
Open-source intelligent electronic load based on HT32F52352, Holtek Cup entry: https://blog.zeruns.tech/archives/784.html
This open-source project is for reference and learning purposes only; replication is not recommended. There are many more, better, and more complete open-source electronic load projects on the LCSC open-source platform!
Electronics/Microcontroller Technology Exchange Group: 820537762
You can apply for free development board samples on the Qinheng official website: https://url.zeruns.tech/h9a99
What is an Electronic Load?
An electronic load is an electronic device used to simulate a real load environment to test the performance of a power supply or electronic circuit. Compared to traditional passive loads such as high-power adjustable resistors or heating wires, electronic loads have many advantages, such as adjustable parameters and ease of use. Whether for professional electronic engineering projects or amateur electronics enthusiasts, an electronic load tester is an essential piece of equipment.
Electronic loads can be divided into AC electronic loads and DC electronic loads based on the type of power supply they test. Functionally, common types include constant current, constant voltage, constant resistance, and constant power. Because most power supplies we commonly see are constant voltage DC power supplies, the main test for this type of power supply is its current output capability. Therefore, in most application scenarios, DC constant current electronic loads are the most common type. Electronic loads can also be divided into two types based on their control method: numerical control and analog. Compared to electronic loads controlled by purely analog circuits, CNC electronic loads use digital control, making parameter adjustment more intuitive. They also offer richer functionality, simpler expansion, and convenient automation of testing.
Project Overview:
This project uses the CH32V307VCT6 Qinheng microcontroller as the main control chip for its electronic load design. It is powered by an 18650 lithium battery for easy portability.
The control method involves the microcontroller's DAC outputting a DC voltage as a reference voltage, which is compared with the voltage after current/voltage sampling and amplification by the operational amplifier. The operational amplifier output controls the MOSFET, thus achieving constant voltage/constant current.
The touchscreen is a 2.8-inch serial port screen from Taojingchi, model TJC3224T028_011R.
The heatsink is a 1356/1366-pin side-blowing heatsink from a 2U server.
The project program was developed using RT-Thread Studio. The circuit design used LCSC EDA software.
The maximum input voltage and current is 100V/10A, and the maximum power is 200W. I didn't take many photos
of the actual product
at the time, so I only found these few. You can check out the demo video.
The download
links below contain: circuit schematics, LCSC EDA project files, PCB fabrication files, program source code, serial port screen project files, and chip manual.
123 Cloud Drive Unlimited Speed ​​Download Link: https://www.123pan.com/ps/2Y9Djv-6NevH.html
Baidu Cloud Drive Download Link: https://pan.baidu.com/s/17YSlBZ6F1M18k7JGa7FlVA?pwd=buxx Extraction Code: buxx
Component Purchase Links

: CH32V307VCT6 Chip: https://s.click.taobao.com/T8MSZot
CH32V307VCT6 Development Board: https://s.click.taobao.com/2JBSZot
INA199A1 Chip: https://s.click.taobao.com/XLuweot
0805 SMD Resistor Sample: https://s.click.taobao.com/p8YSGpt
0805 SMD Capacitor Sample: https://u.jd.com/9uvZoBd
XL1509 chip: https://s.click.taobao.com/DOcRZot
Serial port screen: https://s.click.taobao.com/pyzleot

It is recommended to purchase components from LCSC Mall: https://activity.szlcsc.com/invite/D03E5B9CEAAE70A4.html
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