The LM386 is an audio integrated power amplifier with its own low power consumption, adjustable gain for updating the internal chain, wide supply voltage range, fewer external components and less total harmonic distortion. It is mainly used in low-voltage consumer products. In order to minimize the peripheral components, the voltage gain is built-in as 20, and by adding an external resistor and capacitor between pin 1 and pin 8, the voltage gain can be adjusted to any value within 200.Usage: Detecting the presence or absence of ambient sound and judging the intensity of sound.Audio amplifier chip LM386 (magnified by 200x)Working voltage 3.3V-5.5VProduct size 39.0mm * 21.0mmFixed hole size 2.0mm

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