I tried this experiment with LM358 and LM741. I used the circuit mentioned from this question:
I have not connected any input source. But I am getting an output of 7.5V. I used R1 as 130 Ohm and R2 as 1K. VCC is 9V battery. I was expecting the output as zero. Connecting the input to a source (another 9V or 1.5V battery) did not make any difference in case of LM358. With LM741 I get the output as 1.5V, when my input is connected to 1.5V source.
Can anybody help me?
I am experimenting this for a simple voltage amplifier where the input source is around 100mV max. I needed output as 0-12V.