Lm386 Guitar Amp Schematic. The main improvements of the ruby amp vs the little gem are new the input buffer a renovated volume control and an updated gain potentiometer. Referencing the schematic above guitar audio enters the lm386 on the left at the pin 2 input.
The ruby amp is an lm386 based guitar amplifier. Building a basic functional circuit for the lm386 is dead easy. Electra preamp electra variation combined with the big muff tone control.
To increase the base tone of the guitar you can slide the capacitor to the.
This forms a potentiometer on the feedback loop of the op amp. 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. The first transistor sets the bias voltage for the following stage amp 1 which acts as the first stage of amplification. As you ll see in the schematic we have a sliding capacitor.
