Frivolous Music Box

Ben Andrews
PHYS 333 Final Project Proposal
3-12-17

Overview:

A small assembly of components that plays several (think 5ish) songs. The notes for the music will be created with square waves. Only one note will be played at a time limiting all music to only a melody. Once the Arduino is powered on it will output music until power is lost, or until a tragic memory leak forces a restart. Songs will be repeated until the user changes the song.

Data In:

There will be 2 buttons. One will change the current looping song. The other will change the current beats per minute (BPM).

Data Out:

There will be a data line to a speaker to create tones with a modified PWM. There will also be an LCD display to show the current song and BPM.

Computation and Control:

There will be several songs hard coded into the firmware. Each time the song select button is pressed a CPU interrupt will be handled to switch the current playing song without waiting for song completion. Each time the BPM is changed an interrupt will be handled to update the length of every note and rest before picking the song up where it was interrupted.

Stretch Goal:

Have a third knob to move songs up and down octaves. All notes would have to be recomputed or scaled (to be determined).

Hardware Requirements:

• Arduino
• Speaker or Passive Buzzer
• LCD Display with I2C Interface Board
• Components for High Pass Filter (optional)
• etc wires