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Voltmeter and Ammeter Replica

Overview

This voltmeter and ammeter can measure voltage from 0-30V and current from 0-3A. The measurement range can be increased by changing the resistor, with an accuracy of ±1%. A calibration function is provided within the 5V-9V and 0.5A-1A range, and the calibration range can be further expanded. Five modes are available, switched using the buttons on the left. Mode zero displays the voltage and current normally. Mode one calibrates to 5V, mode two to 9V, mode three to 0.5A, and mode four to 1A. Calibration confirmation is done using the middle button. The rightmost button returns to mode zero.

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2026-03-26 18:08:00

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