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      Assignment 4 - Sound

       

      New parts: Speaker, CdS photoresistor, 10k Resistor (Br, Bl, Or, Gold)

      In Class:

      coil

      How a speaker works.

      Review Resistor Circuits:

      Current Limiting, Pull Down, Voltage Divider (Potentiometer), Pull Up

      See How a light sensitive resistor can create "Music":

       Examples - Basic - AnalogReadSerial -Determine range of A0 

        TonePitchFollower Code Link

      - Adjust to Pin 8 - Adjust to range of A0

       * 8-ohm speaker on digital pin 8 and Gnd

       * photoresistor on analog 0 to Gnd
       * 10K resistor (brown, black, red)  on analog 0 to 5v

      circuit

      Assignment:

      Write a program (sketch) that plays a song.

      Use the following as a guide:

      C Scale

      Note Values

      Table of Musical Frequencies          
                     
      Note Frequency   Note Frequency   Note Frequency
      C 130.82   C 261.63   C 523.25
      C# 138.59   C# 277.18   C# 554.37
      D 146.83   D 293.66   D 587.33
      D# 155.56   D# 311.13   D# 622.25
      E 164.81   E 329.63   E 659.26
      F 174.61   F 349.23   F 698.46
      F# 185   F# 369.99   F# 739.99
      G 196   G 392   G 783.99
      G# 207.65   G# 415.3   G# 830.61
      A 220   A 440   A 880
      A# 233.08   A# 466.16   A# 932.33
      B 246.94   B 493.88   B 987.77


      Treble and Bass Clefs

      Chromatic Scale - Link

    • Table of Musical Frequencies File
    • Musical Frequencies Site URL
    • ChromaticScale URL

      Arduino Code to play the Chromatic Scale

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