Guitar Chromatic Tuner

this tuner is tested on bass guitar. it's not perfect but works for me.

Supplies

2 Resistor

1 Capacitor

1 Operational amplifier

1 Arduino

1 LCD Display

Step 1:

simple non-inverting operational amplifier. powered by 5 volt from Arduino.

Step 2:

opamp output to 7 pin

Step 3:

code for arduino

Step 4:

you can add switch for bypass