Chase Banna Nathan Corwin Robert Scanlon

Problem  Learning to play the guitar can be a very time consuming and frustrating experience.  Without hands-on help or private lessons, many people quit before mastering the basic building blocks of the instrument – chord progression.

Objectives Visual cues to indicate proper finger placement Feedback to reinforce correct finger positions PortabilityProgrammability

Challenges  Programming PIC assembly  Working with surface mount integrated circuits  Touch sensor integrated circuits – clocking and Advanced Key Suppression  Designing and fabricating printed circuit boards

PIC Programming

Surface Mount Integrated Circuits

Touch Sensor / Clocking Source:

Touch Sensors  6 completely independent touch circuits  Projects proximity fields through any dielectric  Adjustable sensitivity  Adjacent Key Suppression  Auto calibrating with adjustable timeout Source:

PCB Design

Advanced Key Suppression

PCB Fabrication

Parts  4 PIC16F690 Microcontrollers  1 PIC16F777 Microcontroller  4 QT160 touch sensor integrated circuits  74LS00  LEDs, 7 segment display, buttons, capacitors, resistors  PCB

Expenses 2 double-sided PCBs$30 Etchant $18 Radio Shack PCB kit$18 PIC microcontrollersFree PICKit2$50 10 QT1080s$30 6 QT160s$30 Passive components$30 Soldering Kit and supplies$40 Total$246

Timeline

Questions/Comments?