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Assignment: Synthesis: Music Instrument (group work)
Collaborators:
Collaborators: Ljuba, David, Nathan
Jam Juggz is a musical instrument that allows users to record a rhythm that is actuated by three different servo motors on different objects. plays that rhythm back in a loop. Users turn a color-coded dial, cover the photosensor, record their own rhythm, and Jam Juggz will play that pattern on the corresponding servo along with previously recorded patterns.
Jam Juggz is customizable: users can tap short rhythms or long rhythms, and edit one pattern at a time. This allows for a creative and dynamic music-making experience.
Video:
Materials:
Code:
/*
int servo1 = 10; // Control pin for servo motor
int servo2 = 11;
int servo3 = 12;
int currentServo;
int lastServo;
int temp = true;
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 minPulse = 500; // minimum pulse width
int potPin = 1;
int potVal;
boolean on = false; // whether the beat signal is activated or not
boolean start = true;
int val = 0; // variable to store the value coming from the fsr
int LED = 4;
boolean hasPlayed = true;
boolean recording = false; //are we in recording mode?
unsigned long currentTime;
long rests1[10] = {0,0,0,0,0,0,0,0,0,0};
long rests2[10] = {0,0,0,0,0,0,0,0,0,0};
long rests3[10] = {0,0,0,0,0,0,0,0,0,0};
void setup(){
Serial.begin(9600);
pinMode(0, INPUT); //fsr pin
pinMode(2, INPUT); //photocell pin
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(servo1, OUTPUT); // Set servo pin as an output pin
pinMode(servo2, OUTPUT); // Set servo pin as an output pin
pinMode(servo3, OUTPUT); // Set servo pin as an output pin
pulseWidth = minPulse; // Set the motor position to the minimum
}
void loop(){
potVal = analogRead(potPin);
if(potVal < 350){
LED = 4;
currentServo = 1;
}
else if(potVal < 700 && potVal > 351){
LED = 5;
currentServo = 2;
}
else{
LED = 6;
currentServo = 3;
}
if(temp){
lastServo = currentServo;
temp = false;
}
//Serial.println(analogRead(potPin));
//if the the photocell is covered, recording is on!
if(analogRead(2) < 500){
recording = true;
}
else{
recording = false;
}
//recording mode
if(recording){
digitalWrite(LED, HIGH);
val = analogRead(0);
//Serial.println(val);
if(potVal < 350 && rests1[0] != 0 && hasPlayed){
resetRests(1);
start = true;
}
else if(potVal < 700 && potVal > 351 && rests2[0] != 0 && hasPlayed){
resetRests(2);
start = true;
}
else if(potVal > 701 && rests3[0] != 0 && hasPlayed) {
resetRests(3);
start = true;
}
//this starts the timer over when you switch servos
if(lastServo != currentServo){
start = true;
lastServo = currentServo;
}
hasPlayed = false;
//if the beat has not already been detected, check to see if the value is greater than 100
if(on == false){
// if it is, check to see if it's the first beat
if(val > 100)
{
// if so, start the timer now!
if(start){
currentTime = millis();
start = false;
}
on = true; //register the beat
add(millis() - currentTime, currentServo); //measure the length of the rest and adds it to the correct array
currentTime = millis(); //reset the currentTime for the next rest
//Serial.println(val);
printRests(currentServo);
}
}
else{
if(val == 0){
on = false;
}
}
} //end if(recording)
//playback mode
else{
//Serial.println("playback");
hasPlayed = true;
digitalWrite(LED, LOW);
for(int i = 0; i < 10; i = i + 1){
if(rests1[i] != 0){
beatServo(servo1);
delay(rests1[i]);
Serial.println("1. beat");
}
}
for(int i = 0; i < 10; i = i + 1){
if(rests2[i] != 0){
beatServo(servo2);
delay(rests2[i]);
Serial.println("2. beat");
}
}
for(int i = 0; i < 10; i = i + 1){
if(rests3[i] != 0){
beatServo(servo3);
delay(rests3[i]);
Serial.println("3. beat");
}
}
} //end playback mode
} //end loop()
void add(unsigned long rest, int servoNum){
//go through the rests arrays and add the latest rest to the end
for(int i = 0; i < 10; i = i + 1){
if(servoNum == 1){
if(rests1[i] == 0){
rests1[i] = rest;
break;
}
}
else if(servoNum == 2){
if(rests2[i] == 0){
rests2[i] = rest;
break;
}
}
else{
if(rests3[i] == 0){
rests3[i] = rest;
break;
}
}
}
}
void resetRests(int servoNum){
if(servoNum == 1){
for(int i = 0; i < 10; i = i + 1){
rests1[i] = 0;
}
}
else if(servoNum == 2){
for(int i = 0; i < 10; i = i + 1){
rests2[i] = 0;
}
}
else{
for(int i = 0; i < 10; i = i + 1){
rests3[i] = 0;
}
}
}
void printRests(int servoNum){
if(servoNum == 1){
Serial.print("1: ");
for(int i = 0; i < 10; i = i + 1){
Serial.print(rests1[i]);
Serial.print(" ");
}
}
else if(servoNum == 2){
Serial.print("2: ");
for(int i = 0; i < 10; i = i + 1){
Serial.print(rests2[i]);
Serial.print(" ");
}
}
else{
Serial.print("3: ");
for(int i = 0; i < 10; i = i + 1){
Serial.print(rests3[i]);
Serial.print(" ");
}
}
Serial.println();
}
void beatServo(int servoNum){
val = 0; // read the value from the sensor, between 0 - 1024
if (val > 0 && val <= 999 ) {
pulseWidth = val*2 + minPulse; // convert angle to microseconds
//Serial.print("moving servo to ");
//Serial.println(pulseWidth,DEC);
}
updateServo(servoNum); // update servo position
val = 999; // read the value from the sensor, between 0 - 1024
if (val > 0 && val <= 999 ) {
pulseWidth = val*2 + minPulse; // convert angle to microseconds
//Serial.print("moving servo to ");
//Serial.println(pulseWidth,DEC);
}
updateServo(servoNum); // update servo position
}
// called every loop().
void updateServo(int servoNum) {
// pulse the servo again if the refresh time (20 ms) has passed:
if (millis() - lastPulse >= refreshTime) {
digitalWrite(servoNum, HIGH); // Turn the motor on
delayMicroseconds(pulseWidth); // Length of the pulse sets the motor position
digitalWrite(servoNum, LOW); // Turn the motor off
lastPulse = millis(); // save the time of the last pulse
}
}