245YD

[LCSC Training Camp] Making a CW32 Voltage and Current Meter

Overview

The LCSC Diwenxing is a development board designed using the Chipsource Semiconductor CW32, featuring excellent ADC performance. A voltmeter and ammeter was designed using this board, capable of simultaneously measuring 0-30V voltage and 0-3A current with good accuracy.
Voltage calibration wiring

: Follow the voltage measurement wiring connected to the voltmeter.
Adjust the input voltage to 5V; the multimeter will display 5V. Press the [Mode] button; the red digital display will show [V.05], and the blue digital display will show the voltage value before calibration. Press the [Calibrate] button to complete the 5V calibration.
Adjust the input voltage to 15V; the multimeter will display 15V. Press the [Mode] button twice; the red digital display will show [V.15], and the blue digital display will show the voltage value before calibration. Press the [Calibrate] button to complete the 15V calibration.

Current calibration

wiring: Follow the current measurement wiring connected to the ammeter.
Adjust the input current to 0.5A; the multimeter will display 500mA. Press the [Mode] button three times; the red digital display will show [A.0.5], and the blue digital display will show the current value before calibration. Press the [Calibrate] button to complete the 0.5A calibration.
Adjust the input current to 1.5A; the multimeter will display 1.5A. Press the [Mode] button four times; the red digital display will show [A.1.5]. Press the [Calibrate] button to complete the 1.5A calibration.

Design Files

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Update:2026-03-26 16:36:17

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