Tone Matrix Music Box ECE477 – Team 17

Presenter: Wan Qi Choo

A music synthesizer that uses the 8x8 grid of 64 buttons as its user interface to produce sound and emit light.

3 music playing modes:• Sweep mode• Gravity mode• Memory mode

3 kinds of sound effects:guitar, piano, and drum beats

Project Overview

Major Subsections1. Four concatenated Button Pads

-shift register SN74HC164-digital output and input pins

Major Subsections2. 64 RGB LEDs -Three AS1115 LED drivers for three colors

-VDD = 2.7 V – 5 V-I2C

Major Subsections3. 12-bit DAC MCP4921

-VDD= 2.7 V – 5.5 V -SPI module -audio sampling rate = 44.1 kHz

4. MIDI -EUSART -serial data rate = 31.25 kHz

Major Subsections

5. 3-axis accelerometer ADXL335 -VDD 3.3 V -3 ADC input channels

Major Subsections

6. LCD displays -shift register SN74HC164 -digital output pins

7. Six push buttons -digital input pins

Microcontroller