Opto-Electric Guitar Pickup

Multidisciplinary Senior Design IRIT

Spring/Fall 13323

Project Background

• Replace traditional electromagnetic-based pick ups with photo-electronic one

• Create aftermarket photo-electronic pickup for acoustic guitar

• Objectives:– Detection of fundamental tones– Ability to switch between digital and analog processing

paths– Maintain original structure and functionality of the

guitar

Outline – Detailed Design Review

• Team Members• Waveform Measurements• Updated Block Diagram• Schematics • Mechanical Drawings• Updated Risk Assessment• Bill Of Materials• Test Plan & MSD II Schedule

Team Members

• Rachel Arquette (Project Manager) (EE)• Caroline Lichtenberger (Lead Engineer) (EE)• Joe Mauger (EE)• Christopher Perry (EE)• Christopher Steele (ME)• Paul Hoops (EE)• Ye Kuang (EE)

Waveform Measurements•See Attachment #1•Sensor Output includes baseband content•Microphone Reading shows broader spikes (See especially the second spike below)

Sensor Output Microphone Reading

Updated Block Diagram

Project Requirements & Goals

• Project Requirement (Customer Needs) – See Attachment #3

Customer Needs

Project Requirements & Goals (2)

• Project Specifications – See Attachment #4

Specifications

Schematic - Sensor

• Functional Decomposition – See Attachment #5

High-Level Functional Decomposition

Schematic - Analog Path

Mount Devices Functional Decomposition Branch

Schematic - Digital Path

Schematic – Power Management

Mechanical Drawings

Display Status Functional Decomposition Branch

Update Risk Assessments

• Resistors available are closest approximation to calculated value

Bill Of Materials

Morphological Chart Part 1

Schedule of MSD II

• Suggested Timeline ->

Schedule of MSD II

• Adjusted Timeline ->

Test Plan – Iterative• Mechanical: Finalize a functional adjustable harness

system for processors and sensors• Analog: Simulate final values; document

experimental waveform outputs; compare to simulated and digital

• Digital: Document waveform outputs; compare to analog

• Misc. Electrical: Design and order PCB’s, assemble, employ guitarist to test both data paths through electric amplifier

Questions?