1. BY: SAM LOPEZ, LUIS CHACHAYMA, JASPREET KAUR
EFFECTS UNIT
BY: SAM LOPEZ, LUIS CHACHAYMA, JASPREET KAUR

2. PROJECT GOALS
Writing music is frustrating at times. Effect pedals help to spur creativity, but they are expensive. Also, the effect(s) available on a unit cannot be changed, prompting more purchases. This economic cost eventually dissuades novices or hobbyists from writing music.
This project introduces a reprogrammable, multi-effect unit at a low cost.

3. PROJECT OVERVIEW
Public website for uploading a different effect to Arduino DUE
Android app for switching between loaded effects via BlueTooth
Signal processing in C on Arduino platform, MATLAB inspired
Schematic/PCB designed with Eagle
3D printed Enclosure

4. HARDWARE DESIGN OVERVIEW
The first op-amp arranged in classic non-inverting topology. The second op-amp act as an inverting buffer.
The third op-amp is arranged as a differential amplifier and the fourth is configured as a summing amplifier

5. PCB FABRICATION

6. ENCLOSURE
Final design
CAD drawing

7. SOFTWARE DESIGN

8. TREMOLO
a: modulation depth
x(n): audio carrier signal
m(n): low-freq. oscillator
Classified as amplitude modulation. Modulation refers to modifying a sin wave signal’s parameters with an audio signal.

9. USER INTERFACE
ANDROID APP
WEBSITE

10. DEMO