Lm386 Circuit. The gain is internally set to 20 but it can be modified from 20 to 200 by placing a resistor and capacitor between pins 1 and 8. The ic lm386 is a low power audio amplifier and it utilizes low power supply like batteries in electrical and electronic circuits.
It comes in an 8 pin mini dip package. The design of lm386 audio amplifier circuit is very simple. It can drive loads from 4 ωto 32 ω.
We need to supply an audio signal to the input of the amplifier pin 3.
Lm386 based audio amplifier circuit simple mic audio amplifier can amplify sound that is given from microphone. In an amplifier circuit the lm386 takes an audio input signal and increases its potential anywhere from 20 to 200 times. The schematic is a mono amplifier so if you wanted to amplify a stereo signal you d need two of these circuits one for each channel and each speaker. Ic lm386 amplifier circuit becomes suitable for applying in small low power audio gadgets like in fm radios door bells telephones etc.
