PitchChanger

Forum 2005-2010 (read only) General Exhibition
1

Hi all,

It's not the greatest of arduino projects but i came up with it in chemistry so... ;D

it basically changes the pitch on the reading of the potentiometer. Incredibly simple and great for people just finished the LED 'Phase'

/*
  PitchChanger
  
  Uses a potentiometer to control the pitch of a speaker.
  
  The circuit:
  * Potentiometer with middle pin connected to analog pin 0 
  (with other pins connected to ground and +5V.
  
  * The speaker connected from digital pin 8 to ground.
  
  Created 5 May 2010
  By Jacob Simpson
  
  Based on an idea for an 'Annoy-a-Tron' customised for Arduino.
  
  */
  
  // Constants won't change. They're used here to set pin numbers:
  
  const int potPin = 0; // Potentiometer connected to Analog pin 0.
 
 // Variables will change:
  int val = 0; // Variable for reading the potentiometer.
  
  void setup()  {
  }
  
  void loop()  {
    tone(8, val); // Play tone on pin 8 at the frequency set by the potentiometer
  }
2

Your example is missing the part where you read the pot's value?

Lefty

3

Just tried it and it doesn't Seem to work, any way I can change the code?

4

(deleted)

5

Try this:

void loop()
{
  val = map(analogRead(potPin), 0, 1023, 100, 1000);
  tone(8, val);
}

You can play with the map() values (the 100 and 1000 numbers).

More info here:

http://itp.nyu.edu/physcomp/Labs/ToneOutput

b