Arduino DUE Programmable Guitar Pedal

Introduction

PedalSHIELD DUE is a programmable Arduino Open Source and Open Hardware guitar pedal made for guitarists, hackers and programmers. Users can program their own effects in C/C++ or download ready effects from the online library.

It is designed to be a platform to learn about digital signal processing, effects, synthesizers and experiment without deep knowledge in electronics or programming.

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: Once the waveform is processed, the signal is taken from the Arduino DACs and prepared to be sent to the Guitar Amplifier. This part also includes a Summing Amplifier which is very useful for delay effects like echo or chorus.

The shield is programmed in C/C++ using the standard free Arduino platform (Linux/Windows/Mac). All tools and programs are open source and compatible with Arduino libraries.