Hello Forum,
I have been working on a color organ project for my school but came across one issue. Ive been trying to set up LM358N op-amp to work properly. The problem is that i cant get a simple inverting circuit to work. For example, Im setting Rf at 100K and Ri at 10K and the gain should be -10. However the output reads only the same voltage i input it. Ive set up op-amps before in class with dual power supply +15V and -15V and they worked fine. This time im trying to set them up with 9V battery and so far no success of getting anything meaningful. Ive searched countless hours on setting up single power supplies, dual power-supplies with one or two 9v batteries, but still no success. Someone please point me into the right direction. I looked at data sheets of the op amp and it clearly says that the chip supports single supply.
heres the link to pdf
http://www.onsemi.com/pub_link/Collateral/LM358-D.PDF
and this is how the simple circuit is set up. i should be getting an output of around -5V. but the multimeter reads 0. I have tried setting up dual power supply where +9V goes into Vcc and -9V into Vee of power supply. still not luck on getting the right output.
Thank you
I have been working on a color organ project for my school but came across one issue. Ive been trying to set up LM358N op-amp to work properly. The problem is that i cant get a simple inverting circuit to work. For example, Im setting Rf at 100K and Ri at 10K and the gain should be -10. However the output reads only the same voltage i input it. Ive set up op-amps before in class with dual power supply +15V and -15V and they worked fine. This time im trying to set them up with 9V battery and so far no success of getting anything meaningful. Ive searched countless hours on setting up single power supplies, dual power-supplies with one or two 9v batteries, but still no success. Someone please point me into the right direction. I looked at data sheets of the op amp and it clearly says that the chip supports single supply.
heres the link to pdf
http://www.onsemi.com/pub_link/Collateral/LM358-D.PDF
and this is how the simple circuit is set up. i should be getting an output of around -5V. but the multimeter reads 0. I have tried setting up dual power supply where +9V goes into Vcc and -9V into Vee of power supply. still not luck on getting the right output.
Thank you