Hi,
I need help with a sculpture I'm working on.
There are 3 guitar strings. On each string is a servo actuated pick and 2 robot pinchers that are also actuated by a servo. So 9 servos all together.
The picker servo can pick the full string, a half string, and a quarter string this way - so string octaves.
I want all 9 servos to pick/pinch at random. There are 9 sequences possible - with 27 possible combinations. I want the timings to be random.
When a person presses a button on the sculpture the sequences fire off randomly for about 2 minutes total, and then the sculpture stops - goes back to waiting for the button to be pressed again.
I need help getting the servos to move randomly i.e. pauses between sequences to be random.
I want the 3 strings to possibly be picked / pinched at the same time - an octave on all three strings at the same time; or to have some some be picked at various time differences - so some get picked/pinched at short or long intervals. These intervals are from 0 - 45 seconds.
I would like to do all this with 1 Arduino - is that possible? How can I best get this random timing?
I'm using an Uno and a servo shield from Adafruit.
Here is what I have:
#include <Wire.h>
#include <Adafruit_PWMServoDriver.h>
Adafruit_PWMServoDriver pwm = Adafruit_PWMServoDriver();
#define SERVOMIN 200 // this is the 'minimum' pulse length count (out of 4096)
#define SERVOMAX 350 // this is the 'maximum' pulse length count (out of 4096)
uint16_t servonum = 0;
const int buttonPin = 12; // assigns pin 13 as the button pin
const int ledPin = 10; // assigns pin 10 as the button led pin
int buttonState; // the current reading from the input pin
int lastButtonState = LOW; // the previous reading from the input pin
unsigned long lastDebounceTime = 0; // the last time the output pin was toggled
unsigned long debounceDelay = 50; // the debounce time; increase if the output flickers
void setup() {
Serial.begin(9600);
Serial.println("Octaves report");
pwm.begin();
pwm.setPWMFreq(60); // Analog servos run at ~60 Hz updates
delay(100);
pinMode (buttonPin, INPUT); // initialize the button pin as an input
pinMode (ledPin, OUTPUT); // initialize the button led pin as an output
}
void loop() {
digitalWrite(ledPin, HIGH); // turn the button led on
int reading = digitalRead(buttonPin); // read the state of the switch into a local variable:
if (reading != lastButtonState) {
lastDebounceTime = millis(); // reset the debouncing timer
}
if ((millis() - lastDebounceTime) > debounceDelay) {
if (reading != buttonState) {
buttonState = reading;
if (buttonState == HIGH) {
digitalWrite(ledPin, LOW); // turn the button led off
// Full String - Drive servo 0: move servo for string pick
Serial.println(servonum);
for (uint16_t pulselen = SERVOMIN; pulselen < SERVOMAX; pulselen++) {
pwm.setPWM(0, 0, pulselen);
}
delay(5000);
for (uint16_t pulselen = SERVOMAX; pulselen > SERVOMIN; pulselen--) {
pwm.setPWM(0, 0, pulselen);
}
delay(10000);
// Half String - Drive servo 1: open and close string pinch
Serial.println(servonum);
for (uint16_t pulselen = SERVOMIN; pulselen < SERVOMAX; pulselen++) {
pwm.setPWM(1, 0, pulselen);
}
delay(5000);
for (uint16_t pulselen = SERVOMAX; pulselen > SERVOMIN; pulselen--) {
pwm.setPWM(1, 0, pulselen);
}
delay(10000);
// Quarter String - Drive servo 2: open and close string pinch
Serial.println(servonum);
for (uint16_t pulselen = SERVOMIN; pulselen < SERVOMAX; pulselen++) {
pwm.setPWM(2, 0, pulselen);
}
delay(5000);
for (uint16_t pulselen = SERVOMAX; pulselen > SERVOMIN; pulselen--) {
pwm.setPWM(2, 0, pulselen);
}
delay(10000);
// Full String - Drive servo 4: move servo one direction for string pick
Serial.println(servonum);
for (uint16_t pulselen = SERVOMIN; pulselen < SERVOMAX; pulselen++) {
pwm.setPWM(4, 0, pulselen);
}
delay(5000);
for (uint16_t pulselen = SERVOMAX; pulselen > SERVOMIN; pulselen--) {
pwm.setPWM(4, 0, pulselen);
}
delay(10000);
// Half String - Drive servo 5: open and close string pinch
Serial.println(servonum);
for (uint16_t pulselen = SERVOMIN; pulselen < SERVOMAX; pulselen++) {
pwm.setPWM(5, 0, pulselen);
}
delay(5000);
for (uint16_t pulselen = SERVOMAX; pulselen > SERVOMIN; pulselen--) {
pwm.setPWM(5, 0, pulselen);
}
delay(10000);
// Quarter String - Drive servo 6: open and close string pinch
Serial.println(servonum);
for (uint16_t pulselen = SERVOMIN; pulselen < SERVOMAX; pulselen++) {
pwm.setPWM(6, 0, pulselen);
}
delay(5000);
for (uint16_t pulselen = SERVOMAX; pulselen > SERVOMIN; pulselen--) {
pwm.setPWM(6, 0, pulselen);
}
delay(10000);
// Full String - Drive servo 8: move servo one direction for string pick
Serial.println(servonum);
for (uint16_t pulselen = SERVOMIN; pulselen < SERVOMAX; pulselen++) {
pwm.setPWM(8, 0, pulselen);
}
delay(5000);
for (uint16_t pulselen = SERVOMAX; pulselen > SERVOMIN; pulselen--) {
pwm.setPWM(8, 0, pulselen);
}
delay(10000);
// Half String - Drive servo 9: open and close string pinch
Serial.println(servonum);
for (uint16_t pulselen = SERVOMIN; pulselen < SERVOMAX; pulselen++) {
pwm.setPWM(9, 0, pulselen);
}
delay(5000);
for (uint16_t pulselen = SERVOMAX; pulselen > SERVOMIN; pulselen--) {
pwm.setPWM(10, 0, pulselen);
}
delay(10000);
// Quarter String - Drive servo 10: open and close string pinch
Serial.println(servonum);
for (uint16_t pulselen = SERVOMIN; pulselen < SERVOMAX; pulselen++) {
pwm.setPWM(10, 0, pulselen);
}
delay(5000);
for (uint16_t pulselen = SERVOMAX; pulselen > SERVOMIN; pulselen--) {
pwm.setPWM(10, 0, pulselen);
}
delay(10000);
servonum ++;
if (servonum > 11) servonum = 0;
digitalWrite(ledPin, HIGH); // turn the button led on
}
lastButtonState = reading; // save the reading. Next time through the loop, it'll be the lastButtonState:
}
}
}
