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OUR PRESENTATION

Topic

SIMPLE OP AMP AUDIO AMPLIFIER

Presented By NameMd. Zahurul IslamAbdullah Al- MamunMd. Mazharul IslamMd. Readul Hasan Sanjid AlamMd. Ahashanulla

ID

11105064

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SequenceEquipmentsGoalsConnectionsHow does it works

EquipmentsLM 386 op amp IC chip.1000 microfarad capacitors (2 Pieces)100 microfarad capacitor(1 Piece)8 ohm speaker9 volt batteryJack socket & Jack pinProject board or breadboardSome connecting wire.

GoalsThe voice amplifier is used to provide loud, clear

output required for high quality voice.It has a line input jack that can be connected to the

output of speech generating device for adequate sound levels in noisy environtments.

Connections

Plug in your op amp and add a wire from pin 6 to power and a wire from pin 4 to ground.

Plug another wire from pin 2 to ground and plug your jack socket into pin 3.

Plug your 1000 microfarad capacitor's positive side into pin 7 and the negative side into ground.

Plug one your another 1000 microfarad capacitor's positive side into pin 1 and the negative side into pin 8.

The other 100 microfarad capacitor's positive side into pin 5 and the negative side into a blank space on your board.

Plug your speaker's positive side to the last capacitor's negative side and the negative side of your speaker to ground.

Plug in your battery's terminals to their respective rails.

How it worksAn amplifier convert low input into high gain.The input obviously goes to 2 & 3.Pin 2 is input(-) & pin 3 is input(+).As pin 3 is input(+) so it is a non-inverting amplifier &

the output will be always greater. When we give signal to the pin 3 the gain will be

achieved in pin 1 & 8.After amplifying the output will be noticed in pin 5.

 If you put a capacitor between pin 1 and 8, you can control the amount of the gain.

ANY QUESTION?

THANK YOU EVERYONE…..