Open Guitar Pedal
 If you are a guitar player and like tinkering with electronics this Open Guitar Pedal will probably be of interest. “The shield has three parts: The Input Stage or Preamp: Amplifies the guitar input signal and sends it to the Arduino microcontroller to be processed. Arduino Board: It does all the Digital Signal Processing (DSP) modifying the signal and adding the effect (delay, echo, distortion, volume…). The Output Stage: