[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]

[Video]

Version 1:

Version 2: