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f-alpha.net » Electronics » Integrated Circuits » Comparator » Let's go... » Experiment 1 - Reference Voltage

Experiment 1 - Reference Voltage at the Comparator

In the circuit shown you connect the positive input (pin 2) of the comparator to a voltage divider consisting of two equal resistors R1, R2.

Circuit diagram reference voltage comparator.

Reference voltage at a comparator circuit. (Enlarge)

With a multimeter you measure at the positive input (pin 2) a voltage of VRef = 4,5 Volt. The light emitting diode LED1 remains dark.

This voltage is now your reference voltage against which you compare the voltages in the coming experiments...

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