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Voltmeter and Ammeter

Overview

Compared to the training camp's solution, the two 3-digit LED displays were replaced with one 4-digit LED display, but simultaneous voltage and current display is not supported

. A resistance measurement circuit was added, allowing adjustment of the measurement range by changing the resistance value of this circuit. Measurements of 0-60V, 0-6V, 0-3A, and resistance are achieved sequentially via four buttons. No calibration function was added. The resistance error increases with the measured resistance value, with minimal error within 30kΩ.
Both the socket and test leads use 4mm banana plugs.

Design Files

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Update:2026-03-27 02:19:07

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