good OP AMP circuit

[Hasnom]

Hi! Everyone...

I got a project to make a circuitry using OP AMP. I am currently in 4th semester Electronic Engineering...

Kindly give me some good and different Ideas or circuits which I can make....

 

[redsox123]

Dark activated switch

I just recently made a circuit using an op-amp as a comparator. One input i had a steady +5V and on the other input the voltage would change based on a photo resistor. When the photo resistor went below +5V the output of the op-amp would go high. This was then used to activate a transistor. I just made it turn on an LED but you can connect the transistor to whatever you would like. Ill try to put up a schematic tomorrow.

 

[Sehlabaka]

Motor speed

Can you help with programming pi16f877 in c in monitoring motor speed using pid controller.

 

[redsox123]

Why are you posting this here? Start a new thread, and no i can't help you. I don't know any programming.

 

[Hasnom]

Thanks for the reply....

It will be great if you can put the schematic here...

What do you say about Light Listener?

 

[ericgibbs]

Hi! Everyone...

I got a project to make a circuitry using OP AMP. I am currently in 4th semester Electronic Engineering...

Kindly give me some good and different Ideas or circuits which I can make....

hi,
Look at this pdf, it has a large number of useful circuits for OPA's.

 

[electronspeed]

I suppose you must have studied transistors.You can go making a TV remote jammer.You need an astable multivibrator,a transistor and an ir(of 37Khz frequency).You can make astable multivibrator using op-amp.First you make this & i will tell rest.

 

[Hasnom]

Thanks... to all of u for ur support...