Daisy Guitar Pedal

Introduction

A digital guitar multi-effect pedal project made with Daisy seed and Arduino.
This is a hybird pedal, using Daisy Seed as DSP processor and a analog module for better overdrive and distortion tone. This forum post has more pictures: https://forum.electro-smith.com/t/hybrid-guitar-pedal-project/1666

Signal Path

The guitar signal path:

Guitar Output -> Input Buffer -> Input 0 of Daisy -> Daisy
(-> Output 1 of Daisy -> Analog Module -> Input 1 of Daisy -> Daisy) //optional
-> Output 0 of Daisy -> Final Ouptut

The Analog Module contains overdrive, distortion, and a tube boost.

Features

A 128*64 Monochrome LCD and a 8*8 LED matrix for display.
10 presets controlled by two footswitchs. (up and down)
Each preset has 10 "effect slots", the user can insert any effects they like and arrange them in any order.
Easy UI navigation with four arrow keys and an enter button.
IR based guitar amp simulation.
On/Off of each analog modules can be controled digitally by relays.
All presets and options are stored in an external EEPROM chip.
All control inputs are handled by interrupts.

Controls

4 foot switches, 5 pushbuttons, and a rotary encoder.
5 pushbuttons are for up / down / left / right / enter.

List of effects

Reverb
Pitchshifter
Analog Module
Overdrive (digital)
Fuzz (digital)
Compressor
Gain
Delay
Chorus
Flanger