We soldered the adquisition circuit in a PCB, as you can see below. Also, we inserted the op amp in a 8-pin socket to avoid damaging it.
The actuactor circuit was soldered in an Arduino Protoshield:
A video-demostration of the completed tuner:
We soldered the adquisition circuit in a PCB, as you can see below. Also, we inserted the op amp in a 8-pin socket to avoid damaging it.
The actuactor circuit was soldered in an Arduino Protoshield:
A video-demostration of the completed tuner:
Arduino Guitar Tuner 