I purchased a set of LM358Ps from aliexpress to learn and experiment with Op Amps (link
As for the pinout, I referred to the TI datasheet here. The pinout image is attached below.
The first thing I tried out was a simple non-inverting circuit (kindly refer to attachments for the schematic). Vcc and GND were connected to a 5V power supply and V+ was connected to one cell of a LiPo battery at 3.83V. The grounds were tied together.
However, Vout was constantly at the same voltage as the V+ voltage (3.83V in my case) although I was expecting an amplification of 2x as I used 10k resistors for both R1 and R2.
Having tried out all the chips in the set and getting the same result all the time, I’m inclined to think that there could be a systematic error in the way in which I am wiring up the Op Amp. However, could it be possible that all the boards are defective?
I’ve attached a photograph of my breadboard setup if that helps in identifying the issue.
Any help would be greatly appreciated!