Chase BannaNathan CorwinRobert 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

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: http://www.qprox.com/downloads/datasheets/qt160_107.pdf

Touch Sensors

6 completely independent touch circuits

Projects proximity fields through any dielectric

Adjustable sensitivity Adjacent Key

Suppression Auto calibrating with

adjustable timeout

Source: http://www.qprox.com/downloads/datasheets/qt160_107.pdf

PCB Design

Advanced Key Suppression

PCB Fabrication

PCB Fabrication

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 $30Etchant $18Radio Shack PCB kit $18PIC microcontrollers FreePICKit2 $5010 QT1080s $306 QT160s $30Passive components $30Soldering Kit and supplies $40Total $246

Timeline

Questions/Comments?