Single Input to Differential Input Adapter for Digital Voltmeter

I some cases, a differential input is needed for voltage measurement. Using the only one operational amplifier, you can build an adapter to provide a floating input for your ground-referenced¬† voltmeter. Use 1% tolerance metal film resistor for R1 and R2.¬† Adjust VR1 to give zero voltage output when the input probe is shorted.¬† You can use voltage supply +Ub […]

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