LM386

          

    LM386 DIP-package The LM386 is a dip package OP_AMP specialized for low power audio amplifications still using in these day.

there are different types of LM386 versions I'm using LM386 N-4...depending upon the variation the input voltage can vary...

for my chip its "min=4V" to "max=18V"   , it has nearly power gain of 1W and 1W may not sound enough but it's enough for a mono audio output speaker.

Here are some best youtube videos on op amp by various youtubers. best project videos on op amps.

[Note: before you go make this circuit i recommend powering it with some 9V or 6V battery of walladapter less than 5W or so.]

the below circuit is by  AFROTECHMODS a nice video on building a 1w mono amplifer circuit  using a lm386. i'm using the circuit in datasheet with gain of A = 200.     

The Vin is audio source like a mp3 files container like phone or pc. The it should be connected to a pot to control the audio sound for amplification.

need the 0.05Uf capacitor and 10ohms resistor for high pass filter sends the noise signals(high freq) to GND. or you can use a 0.01Uf capacitor only and it works too.

[Note: recommended value for ouput capacitor to use 1000uf max ]