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Revision of Lab 8 Alarming Chicken Clock from Thu, 11/01/2007 - 00:51

Project Members: 
Aylin Selcukoglu
Seung Wan Hong
Seung Wook Kim
Shawna Hein

[Description]

* Step 1: Designing & implementing Manual Cuckoo Clock

- Vertically-swinging double doors

- The bird opens and closes the door when pulling back strings.

* Step 2:  Designing & implementing Servo-motor Operating Clock (Alarming Chicken)

- Vertially-swinging single door

- A set of mechanical linkages opens and closes the door, as well as pushes the chicken forward

- When the alarm goes off (the "clock is striking") the bird automatically emerges through the door.

 

[Components]

- For Step 1: Cardboards, Woodsticks, Basswood, Pins, Strings and Rubber Bands

- For Step 2: Erector (Toy Assembly), Servo Motor, Piezo Speaker and Rubber Bands

 

[Arduino Code]

int speakerOut = 8;              
byte names[] = {'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C'}; 
int tones[] = {1915, 1700, 1519, 1432, 1275, 1136, 1014, 956};
byte melody[] = "2d2a";//1f2c2d2a2d2c2f2d2a2c2d2a1f2c2d2a2a2g2p8p8p8p";
// count length: 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0
//                                10                  20                  30
int count = 0;
int count2 = 0;
int count3 = 0;
int MAX_COUNT = 2;

int servoPin = 7;      // Control pin for servo motor
int pulseWidth = 0;    // Amount to pulse the servo
long lastPulse = 0;    // the time in millisecs of the last pulse
int refreshTime = 20;  // the time in millisecs needed in between pulses
int val;               // variable used to store data from serial port

int minPulse = 500;   // minimum pulse width
int maxPulse = 2250;  // maximum pulse width

void setup() {
  pinMode(speakerOut, OUTPUT); 
  pinMode(servoPin, OUTPUT);  // Set servo pin as an output pin
  pulseWidth = maxPulse;      // Set the motor position to the minimum
  Serial.begin(9600);         // connect to the serial port
  Serial.println("Servo control program ready");
}

void loop() {
  val = Serial.read();      // read the serial port
  if (val >= '2' && val <= '9' ) {
    val = val - '0';        // convert val from character variable to number variable
    val = val - 1;          // make val go from 0-8
    pulseWidth = (val * (maxPulse-minPulse) / 8) + minPulse;  // convert val to microseconds
    Serial.print("Moving servo to position ");
    Serial.println(pulseWidth,DEC);
  }
  updateServo();   // update servo position
}

// called every loop().
// uses global variables servoPi, pulsewidth, lastPulse, & refreshTime
void updateServo() {
  // pulse the servo again if rhe refresh time (20 ms) have passed:
  if (millis() - lastPulse >= refreshTime) {
    digitalWrite(servoPin, HIGH);   // Turn the motor on
    delayMicroseconds(pulseWidth);  // Length of the pulse sets the motor position
    digitalWrite(servoPin, LOW);    // Turn the motor off
    lastPulse = millis();           // save the time of the last pulse
  }

  if (pulseWidth == 718 ) {
    playMelody();
  } 
}

void playMelody() {   
  for (count = 0; count < MAX_COUNT; count++) {
    for (count3 = 0; count3 <= (melody[count*2] - 48) * 30; count3++) {
      for (count2=0;count2<8;count2++) {
        if (names[count2] == melody[count*2 + 1]) {      
          digitalWrite(speakerOut,HIGH);
          delayMicroseconds(tones[count2]);
          digitalWrite(speakerOut, LOW);
          delayMicroseconds(tones[count2]);
        }
        if (melody[count*2 + 1] == 'p') {
          // make a pause of a certain size
          digitalWrite(speakerOut, 0);
//          delayMicroseconds(500);
        }
      }
    }
  }
}

[Images]

Lab09_1Lab09_2Lab09_3

 [Video]



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