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sharon1 2nd September 2012 04:29 PM

recommed op amp
i want to build a small audio and i am novice in electronic
i found this circuit on the net:

it seems pretty small two question:
1)how much speaker WATT it can drive?
2)which op-amp to choose?
3)and of curse what the value of the components?

Fast Eddie D 2nd September 2012 05:17 PM

No op amp will drive a speaker.

There are many small amplifiers on a chip that will provide about one watt from a 9 volt source. Radio Shack even sells one.

donpetru 2nd September 2012 05:50 PM

TDA2050 or TDA2040 or TDA2030... with some adjustments in the diagram.

sharon1 2nd September 2012 06:03 PM

to fast eddie
so for what the output ?

Fast Eddie D 2nd September 2012 10:13 PM


Originally Posted by sharon1 (
to fast eddie
so for what the output ?

Try something like this. Google Image Result for

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