741 non-inverting showing DC output

[blinky87]

Hi all

Playing around with a 741 Inverting opamp with this configuration;

input voltage; 0.5V
Rf = 2.1k
Rin = 1k
V+ = 9v
V- = 0

and the circuit works.

However, in a non-inverting configuration, below, I have the following output;
(I have tried different 741's)

[Andy Watson]

The datasheet suggests that the common-mode input range of the 741 is two to three volts less that your power supply rails. In your case this would be between 2 and 7 volts (at best!). Having one input at 0.5V is not going to work - the 741 is not in its operating range. Similar restrictions apply to the output too.

[MarkF]

+1 what Andy said.  The signal inputs and output can not approach the power rails.

Offset Null:

[MarkF]

[blinky87]

Thank you guys. A lot of help here!

[blinky87]

I got the circuit working, thank you guys. Seeing the clamping in the video helped and confirmed my thoughts as well as your help.
Also since it was single supply VCC+ 9V and VCC- was 0, clearly I had huge clamping and looked like half wave rectification.
Putting VCC+/- 9  worked.