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Amplifier audio small to use with 9V battery operated

2015-01-05 10:05  
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This is an audio amplifier that can be used with a small 9 volt Battery Operated,Current use as little as 5 milliamps.And amplification up to 500 mW.
Which is sufficient to expand the sound from asound aboutor theCD Walk Manout to the small speakers clearly.
When entering the power supply 9-volt circuit IC1 numberLM386 amplifierIC size is 300-800 mW, Depending on the power supply circuit with,This is from 4-15 volts.

Once entered into the input pin 3,The non inverting pin to amplifier non-return phase.C1 will be served cut out the noise input to ground.And C2 increases the rate of amplifier,C2 is to add more value.But if the C2 Too much distortion (the C2 should not exceed 100uF).The output of IC1 is out of the pin 5 through C4 coupling audio signals to better and DC block and not passed to the speaker.For the audio portion will also be fed back through R2 and C3 to the high frequency response better.

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