About Operational Amplifier?
The amplification seems to be fine. When I give an Input signal of 5 volts I get an out put of 14v.
But the problem comes when I bring the input signal to zero the output doesnt fall to zero it remains at about 7 volts.
Seems like the amplifier just adds another 7 volts to the input signal. But, according to the opamp equations ie., for the non-inverting configuration Vout=Vin(1+R1/R2) so theoretically when Vin =0 Vout should also become zero , but this doesnt happen.
I need to connect the microcontroller output amplified by UA741 to control a 12 v relay , but since I cant get 0 o/p I am not able to control the relay.
Please tell me why the Vout remains stuck to 7 volts instead of turning 0.