Arduino UNO Guitar Pedal © CC BY-NC

pedalSHIELD UNO is an open-source Arduino UNO programmable guitar pedal.

The idea is to build a guitar pedal with easy-to-find parts and have fan creating your own sounds from the first day without deep knowledge in DSP programming or electronics.

Everybody can share their ideas or codes in the forum where you can also download the already coded effects (booster, distortion, fuzz, delay, vibrato, tremolo, wave-generator, metronome, etc).

We created some documents so you can do the project easily:

• A pdf manual to build pedalSHIELD UNO circuit in 5 steps.

• A quick guide to start programming it.

It is an economic platform to start developing your interest in effects, audio electronics, guitar pedals or digital signal processing.

The whole project is Open-Source and Open-Hardware, all the schematics and files are free. The design was also created using KiCAD, an open source ECAD for Win-Linux-Mac so everybody can contribute.

All the parts where selected trying to find the easiest to source parts, check the complete bill of materials below:

Capacitors

• C5,C2, C7, C8, C9 6.8n

• C3, C6, C10 4.7u

• C1, C11 100n

• C4 270p

Resistors

• R12,R13, R10, R9, R6, R4, R3 4.7K

• R5, R7, R8, 100K

• R1, R2 1M

• R11 1M2

Others

• RV1 500K

• D1 Led 3mm blue

• U1 TL972

• pdip-8 IC Socket dip 8 socket

• SW1 3DPT

• SW2 Toggle switch

• SW3, SW4 Pushbutton

• Conn1,2,3,4 1 40 pin header

• J1, J2 1/4 Jack audio