In this lab, we designed a circuit with an Operational Amplifier that would invert the input voltage.
The goal was to get an overall gain of 2, and to have R1 equal about 2,000 Ohms. Since gain is equal to -R2/R1, our R2 value must be about 4,000 Ohms.
Above is the schematic of the LM358, which includes 2 opamps. We only used 1, which included pins 1,2, and 3. Pins 4 and 5 were VCC+ and VCC-.
Above are the pictures of the circuit, as well as our first and last measurements.
All our measurements agreed with our calculations, and inverted the voltage. When a positive voltage was put into the negative pin of the opamp, a negative voltage was output, and vice versa.
So far everything looks good. Make sure you follow the same steps during the exam.
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