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Assignment: Synthesis: Music Instrument (group work)
Collaborators:
Assignment: Synthesis: Music Instrument (group work)
Collaborators: RyanKaufman, xiaomeng
Description
Our musical instrument is a rotating set of arms that tap glasses of water to make sound. Each arm has a servo at the end that can be independently operated by hitting a button, and there is also a servo in the center to rotate the set of arms and change which chord of three glasses will be hit. That is activated by turning a wheel.
Components Used
Our instrument
The glasses around the rotating servo arms
Our buttons, mase of floam
Turning the wheel changes the glasses that are hit.
Arduino Code
int servoPin = 9; // Control pin for servo motor
int servoPin1 = 10;
int servoPin2 = 11;
int sensorPin = 0; // select the input pin for the force sensor
int sensorPin1 = 1;
int sensorPin2 = 2;
int pulseWidth = 0; // Amount to pulse the servo
int pulseWidth1 = 0;
int pulseWidth2 = 0;
// setup for the center section
int servoPins = 5; // Control pin for servo motor
int potPins = 3; // select the input pin for the potentiometer
int pulseWidths = 0; // Amount to pulse the servo
long lastPulses = 0; // the time in millisecs of the last pulse
int refreshTimes = 50; // the time in millisecs needed in between pulses
int vals; // variable used to store data from potentiometer
int minPulses = 500; // minimum pulse width
long lastPulse = 0; // the time in millisecs of the last pulse
long lastPulse1 = 0;
long lastPulse2 = 0;
int refreshTime = 20; // the time in millisecs needed in between pulses
int minPulse = 500; // minimum pulse width
int minPulse1 = 500;
int minPulse2 = 500;
int maxPulse = 2250; // maximum pulse width
int maxPulse1 = 2250;
int maxPulse2 = 2250;
int valfsr = 0; // variable to store the value coming from the sensor
int valfsr1 = 0;
int valfsr2 = 0;
int val = 0;
int val1 = 0;
int val2 = 0;
int ledPin = 2; // select the output pin for the LED
int ledPin1 = 3;
int ledPin2 = 4;
void setup() {
pinMode(servoPin, OUTPUT); // Set servo pin as an output pin
pinMode(servoPin1, OUTPUT);
pinMode(servoPin2, OUTPUT);
pulseWidth = minPulse; // Set the motor position to the minimum
pulseWidth1 = minPulse1;
pulseWidth2 = minPulse2;
Serial.begin(9600);
// Center section below
pinMode(servoPins, OUTPUT); // Set servo pin as an output pin
pulseWidths = minPulses; // Set the motor position to the minimum
Serial.begin(9600); // connect to the serial port
// Serial.println("servo_serial_better ready");
}
void loop() {
valfsr = analogRead(sensorPin); // read the value from the sensor, 0-1023
valfsr1 = analogRead(sensorPin1);
valfsr2 = analogRead(sensorPin2);
delay(50); // rest a little...
if (valfsr >= 50) { // if input, move servo
val = 4;
digitalWrite(ledPin, HIGH); // sets the LED on
}
if (valfsr1 >= 50) { // if input, move servo
val1 = 4;
digitalWrite(ledPin1, HIGH); // sets the LED on
}
if (valfsr2 >= 50) { // if input, move servo
val2 = 4;
digitalWrite(ledPin2, HIGH); // sets the LED on
}
// Serial.println(val2);
if (val >= 1 && val <= 9 ) {
val = val - 1; // make val go from 0-8
pulseWidth = (val * (maxPulse-minPulse) / 8) + minPulse; // convert val to microseconds
Serial.println(pulseWidth,DEC);
}
if (val1 >= 1 && val1 <= 9 ) {
val1 = val1 - 1; // make val go from 0-8
pulseWidth1 = (val1 * (maxPulse1-minPulse1) / 8) + minPulse1; // convert val to microseconds
Serial.println(pulseWidth1,DEC);
}
if (val2 >= 1 && val2 <= 9 ) {
val2 = val2 - 1; // make val go from 0-8
pulseWidth2 = (val2 * (maxPulse2-minPulse2) / 8) + minPulse2; // convert val to microseconds
Serial.println(pulseWidth2,DEC);
}
updateServo(); // update servo position
updateServo1();
updateServo2();
digitalWrite(ledPin, LOW); // sets the LED off
digitalWrite(ledPin1, LOW);
digitalWrite(ledPin2, LOW);
// center section
vals = analogRead(potPins); // read the value from the sensor, between 0 - 1024
if (vals > 0 && vals <= 999 ) {
pulseWidths = vals*2 + minPulses; // convert angle to microseconds
// Serial.print("moving servo to ");
// Serial.println(pulseWidth,DEC);
}
updateServos(); // update servo position
}
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
}
}
void updateServo1() {
// pulse the servo again if rhe refresh time (20 ms) have passed:
if (millis() - lastPulse1 >= refreshTime) {
digitalWrite(servoPin1, HIGH); // Turn the motor on
delayMicroseconds(pulseWidth1); // Length of the pulse sets the motor position
digitalWrite(servoPin1, LOW); // Turn the motor off
lastPulse1 = millis(); // save the time of the last pulse
}
}
void updateServo2() {
// pulse the servo again if rhe refresh time (20 ms) have passed:
if (millis() - lastPulse2 >= refreshTime) {
digitalWrite(servoPin2, HIGH); // Turn the motor on
delayMicroseconds(pulseWidth2); // Length of the pulse sets the motor position
digitalWrite(servoPin2, LOW); // Turn the motor off
lastPulse2 = millis(); // save the time of the last pulse
}
}
void updateServos() {
// pulse the servo again if the refresh time (20 ms) has passed:
if (millis() - lastPulses >= refreshTimes) {
digitalWrite(servoPins, HIGH); // Turn the motor on
delayMicroseconds(pulseWidths); // Length of the pulse sets the motor position
digitalWrite(servoPins, LOW); // Turn the motor off
lastPulses = millis(); // save the time of the last pulse
}
}