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LM386 Audio Amplifier Circuit - ElectroSchematics.com
https://www.electroschematics.com/lm386-audio-amplifier/
audio amplifier. LM386. The integrated chip LM386 is a low power audio frequency amplifier requiring a low level power supply (most often batteries). It comes in an 8-pin mini-DIP package. The IC is designed to deliver a voltage amplification of 20 without external add-on parts.
LM386 Audio Amplifier Circuit Diagram
https://circuitdigest.com/electronic-circuits/lm386-audio-amplifier-circuit
This circuit is based on LM386 IC to amplify sound. LM386 is a low voltage audio amplifier and frequently used in battery powered music devices like radios, guitars, toys etc. The gain range is 20 to 200 , gain is internally set to 20 (without using external component) but can be increased to 200 by using resistor and capacitor between PIN 1 and 8, or just with a capacitor.
LM386 audio amplifier circuit with PCB
https://www.eleccircuit.com/lm386-audio-amplifier-circuit/
LM386 Audio Amplifier : 5 Steps - Instructables
https://www.instructables.com/LM386-Audio-Amplifier/
Multipurpose PCB with 417 Holes 5-15 Volt DC power supply (4 AA or 1 9v Battery) 8 Ohm Speaker Audio Source e.g. iPod 8-Pin Retention Contact IC1 IC LM386 Audio Amp IC R1 Resistor 10 Ohm R2 Resistor 1K Ohm R3 Potentiometer 10K Ohm R4 Resistor 10 Ohm C1 Capacitor 220 Micro Farad C2 Capacitor 10 Micro Farad C3 Capacitor 220 Micro Farad
DIY LM386 Audio Amplifier : …
https://www.instructables.com/DIY-LM386-Audio-Amplifier-DatasheetCircuitPCBHardw/
Datasheet says: To make the LM386 a more versatile amplifier, two pins (1 and 8) are provided for gain control. With pins 1 and 8 open the 1.35-kΩ resistor sets the gain at 20 (26 dB). If a capacitor is put from pin 1 to 8, bypassing the 1.35-kΩ resistor, the gain will go up to 200 (46 dB).
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