Don't Fret

Overview

The goal of this project is to create a device that takes a sound input, specifically from a guitar, and outputs a manipulated sound. The device will utilize a Raspberry Pi to take the input from an instrument and return an edited sound. The coding will most likely be done in C and allows for a unique effects from the standard reverb, fuzz, etc. effects as well as extensive capability to reprogram. 

Link to Log: https://classes.engineering.wustl.edu/ese205/core/index.php?title=Don%27t_Fret_Log

Team Members

• Chance Bayles
• GraceAnne Aldred
• Jared Malkin
• TA: John Fordice

Objectives

• Learn to utilize Raspberry Pi (basics)
• Adapt code from https://www.electrosmash.com/pedal-pi and https://blog.hackster.io/program-your-own-guitar-effects-with-pedal-pi-d77b8c56c0b0 to allow the pedal to run two effects
• Adapt circuitry from the single function pedal on https://www.electrosmash.com/pedal-pi to account for an additional pushbutton to trigger second effect
• Learn how to 3D print a cover and design a cover that allows for usage of both pushbuttons
• Assemble together as a unit and test with guitar and amplifier

Challenges

• Learn to program a Raspberry Pi
• Allowing Raspberry Pi to take input (instrument) and give output (amplifier or microphone)
• Putting together circuitry to add a second function
• Coding for a second function

Materials

(Supplied)

• Assorted Capacitors and Resistors
• 3mm LEDs

(Purchased)

• Resistor Trimmer $0.38
• Op-amp rail-to-rail, pdip8 $0.36**
• 12bit ADC, p-dip8 $2.66**
• socket dor dip8 $0.10 x2
• 3PDT footswitch $7.77
• SPDT toogle switch $2.11
• off-on pushbutton $10.62** x2
• 2.54 pitch pin header $3.95** (Digi-Key)
• stereo 6.35mm jack $1.46 x2

(Shipping and Backorder)

• $7.99
• $1.99

1. Notes

• All materials are from Mouser unless otherwise noted*
  • need to confirm
    • May vary depending on additional features***

www.mouser.com

Ghant Chart

Project Proposal Presentation

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Circuitry

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These diagrams is taken from the opensource project on Electrosmash.com regarding Raspberry Pi guitar pedals.