Electronic voltmeter circuit diagram

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The electronic voltmeter circuit automatically selects the measurement range according to the magnitude of the measured voltage without the direct participation of the person, and greatly reduces the workload of the inspection and adjustment from the surface. During the measurement, when the measured voltage rises, the circuit automatically The nearest higher range is selected for measurement, and when the measured voltage drops, it is automatically turned on to the lower range for measurement. An electronic voltmeter circuit diagram:

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