[Paul Gallagher] has the answer in one case, he’s used not one kit but two of them as for a guitar tuner project. At its heart is a Boldport Cuttlefish ATmega328 development board, and for its ...

(NOTICE: The Instruments and the Strap in the photos are not included! If you like the Strap, please search "MUSIC FIRST guitar strap" on Amazon) ...

Guitar tuner app for Android with support for custom tunings.