Lm386 Amplifier Schematic. Leaving the power supply portion out of the discussion that s the bit at the top of the schematic beginning with the battery snap connector this schematic shows what i consider to be the minimum requirements for a functional and robust audio amplifier using the lm386 ic. The ic is designed to deliver a voltage amplification of 20 without external add on parts.
Lm386 audio amplifier circuit diagram below is the schematic diagram given for this lm386 ic based audio amplifier. The schematic of the lm386 amplifier is shown below. The ruby amp is an lm386 based guitar amplifier.
It comes in an 8 pin mini dip package.
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. The first transistor sets the bias voltage for the following stage amp 1 which acts as the first stage of amplification. Ruby amp schematic diagram. It is very useful in low power projects or circuits which are powered by batteries such as radio set tape player etc.
