LCSC CW32 Digital Voltage and Current Meter Expansion Board (Training Camp)

I. Design Background
The digital voltmeter and ammeter combines ADC technology with circuit measurement principles, accurately converting analog voltage and current signals into digital displays for easy reading and analysis by electronic engineers. This device not only improves the accuracy and efficiency of circuit measurements but also helps engineers better understand circuit behavior, making it a powerful tool for electronic design and troubleshooting, and playing a significant supporting role in the work of electronic engineers. In product applications, the digital voltmeter and ammeter ensures the accuracy and safety of circuit design, while also providing strong support for product quality control and subsequent maintenance.
II. Hardware Design
Compared to the official case, this project has the following changes:
Power Supply Design :
This project uses the LDO chip 78L05 as the DC power output and the IP5306 as the battery management chip.
Voltage and Current Range Switching
: A jumper combined with a button is used for voltage and current range switching.
Display:
A 0.96-inch OLED display is used.