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Using Guitar Pedals to Introduce Amplifier Design and Printed Circuit Board Layout in an Electronics Course

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Conference

2021 Illinois-Indiana Regional Conference

Location

Virtual

Publication Date

April 16, 2021

Start Date

April 16, 2021

End Date

April 17, 2021

Conference Session

Labs and Experiential Learning

Tagged Topic

Labs and experiential learning

Page Count

11

DOI

10.18260/1-2--38281

Permanent URL

https://peer.asee.org/38281

Download Count

46

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Paper Authors

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Benjamin D McPheron Anderson University

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Benjamin D. McPheron is Chair of the Department of Physical Sciences & Engineering and Associate Professor of Electrical Engineering at Anderson University. Dr. McPheron received his B.S.E.E. in Electrical Engineering at Ohio Northern University in 2010, and his Ph.D, in Electrical Engineering from the Department of Electrical Engineering at The Pennsylvania State University in 2014. Dr. McPheron teaches Freshman Engineering and various courses in Electrical Engineering including Circuit Theory, Electronics, Controls, and Mechatronics. His research interests include Engineering Education, Control Systems, Mechatronics, and Signal Processing.

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Kenneth Michael Parson Thor Motor Coach

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Kenneth M. Parson is a 2020 graduate of Anderson University in Electrical Engineering and currently holds a position of Electrical Engineer at Thor Motor Coach.

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Abstract

One of the foundational learning outcomes of upper level engineering electronics courses is the analysis and implementation of discrete amplifier design. While it is relatively straight-forward to implement these designs in the lab, the application of amplifiers in practice may be difficult for students to understand.

A simple application of discrete amplifier circuits is the analysis and design of guitar effects pedals. Effects pedals, and in particular overdrive, fuzz, and distortion circuits, demonstrate keystone concepts of electronics, including single stage amplifier design, multistage amplifier design, clipping, biasing, and response control using potentiometers. In addition, the implementation of these amplifiers in a small package size (within a metal enclosure) provides an excellent avenue for exposing students to printed circuit board (PCB) layout and prototyping. One benefit of these circuits is that they can be used with an input device (guitar) and an output device (audio amplifier) and students can physically observe (and hear) the results of their design. One particular benefit of this approach is a greater understanding of frequency response characteristics, as students are able to hear the results.

In this work, several lab projects were developed for an upper level engineering electronics course to leverage guitar pedal design for teaching discrete amplifier design and PCB layout. This paper presents these projects, resources for implementing the projects, as well as assessment results from the initial offering of this course. In addition to direct assessment of the amplifier design course objectives, qualitative student survey results are presented. Both the direct assessment and student survey results suggest that this approach was effective in helping students better understand amplifier analysis and design.

McPheron, B. D., & Parson, K. M. (2021, April), Using Guitar Pedals to Introduce Amplifier Design and Printed Circuit Board Layout in an Electronics Course Paper presented at 2021 Illinois-Indiana Regional Conference, Virtual. 10.18260/1-2--38281

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