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CW32 Voltage and Current Meter

Overview

The power supply uses four 1.5V batteries to provide 6V.

An SE8550K2 LDO is then used to step down the voltage to power the development board.

A TL431 provides a stable reference voltage to the development board.

Although the CW32 development board already has a built-in stable reference voltage,

the circuit is simple and clear, with extra I/O ports, so the digital tube is directly lit by the development board's I/O.

This is a great learning project, and I thank LCSC EDA for providing this learning opportunity.

Demo video:
[CW32 Voltage and Current Meter] Open Source_Bilibili_bilibili

Design Files

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Update:2026-03-26 16:34:17

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