6. Motor Chaos Mobile
Chaotic Motor Pendulum
A pot controls a motor, to which an LED is attached. As the motor speeds up, it whips a cable around faster. A speaker is then outputting a random note that speeds up as the motor speeds up. The motor is being powered by the 5 volts from the arduino.
Video: http://www.youtube.com/watch?v=naNsSJ3qnnY
/*
* Erich
*/
byte names[] = {'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C'};
int tones[] = {1915, 1700, 1519, 1432, 1275, 1136, 1014, 956};
int potPin = 0; // select the input pin for the potentiometer
int motorPin = 9; // select the pin for the Motor
int speakerPin = 11;
int pot = 0; // variable to store the value coming from the sensor
int note = 0;
int tempo = 0;
void setup() {
pinMode(speakerPin, OUTPUT);
pinMode(potPin, INPUT);
pinMode(motorPin, OUTPUT);
Serial.begin(9600);
}
void loop() {
pot = analogRead(potPin); // read the value from the sensor
tempo=map(pot,0,1024,250,25);
analogWrite(motorPin, pot/7); //
Serial.print("Tempo=");
Serial.print(tempo);
note = random(8);
Serial.print(" Note=");
Serial.println(names[note]);
// for( int i=0; i<tempo; i++ ) { // play it for tempo cycles
for( int i=0; i<tempo; i++ ) { // play it for tempo cycles
digitalWrite(speakerPin, LOW);
delayMicroseconds(tones[note]);
digitalWrite(speakerPin, HIGH);
delayMicroseconds(tones[note]);
}
}
