next topic »

[Reply #15 on:]

Hey Groove,

We don't know how to combine the Ardrumo Sketch and the fading LED sketch successfully. We were wondering if you knew?

We're trying it ourselves but any input would be helpful.

Thanks

[Reply #16 on:]

I combined them and it kind of worked,

BUT we want the LED to fade in and out continuously independently of whether the piezo buzzers are hit.

This is the Code we've got but the LED fades in and out only when you hit the piezo- and you can't get a sound/any reaction from the piezo again until the light has faded back out.

Code:

/*
 * Ardrumo sketch
 *
 * Use with the Ardrumo software here:
 * http://code.google.com/p/ardrumo/
 * This is designed to let an Arduino act as a drum machine
 * in GarageBand (sorry, Mac OS X only).
 */

#define LEDPIN     13     // status LED pin
#define PIEZOTHRESHOLD 5  // analog threshold for piezo sensing
#define PADNUM 3          // number of pads
#define LEDAPPLE   9 // the pin for the LED


int val;

void setup() {
  pinMode(LEDPIN, OUTPUT);
  pinMode(LEDAPPLE, OUTPUT); // tell Arduino LED is an output
  Serial.begin(57600);   // set serial output rate
}

void loop() {

  // Loop through each piezo and send data
  // on the serial output if the force exceeds
  // the piezo threshold
  for(int i = 0; i < PADNUM; i++) {
    val = analogRead(i);
    if( val >= PIEZOTHRESHOLD ) {
      digitalWrite(LEDPIN,HIGH);  // indicate we're sending MIDI data
      Serial.print(i);
      Serial.print(",");
      Serial.print(val);
      Serial.println();
      digitalWrite(LEDPIN,LOW);
      
        for (i = 0; i < 255; i++) { // loop from 0 to 254 (fade in)
    analogWrite(LEDAPPLE, i);      // set the LED brightness
    
      delay(10); // Wait 10ms because analogWrite
               // is instantaneous and we would
               // not see any change
  }

  for (i = 255; i > 0; i--) { // loop from 255 to 1 (fade out)

    analogWrite(LEDAPPLE, i); // set the LED brightness
    delay(10);           // Wait 10ms
  }
    
    
    }
  }

}

[Reply #17 on:]

I combined them and it kind of worked

You haven't said what "worked" means in this context, so until that is clear to all, it isn't really possible to help.

"Have a look at the "Blink without delay" tutorial" is usually what I say at this point.

[Reply #18 on:]

Sorry!!

What I meant by it 'kind of works' last time was:
-the LED faded in and out but only when a piezo buzzer was hit, and we wanted it to go regardless of the piezo buzzers activity.

Ok, I went through the blink without delay tutorial.

The LED blinks continuously which is what we want- but it stops the Ardrumo sketch working.
So we have no sound coming out when the piezo sensors are hit.

This is the combined sketched I tried but no sound came out:

Code:

/* Blink without Delay
 
 Turns on and off a light emitting diode(LED) connected to a digital  
 pin, without using the delay() function.  This means that other code
 can run at the same time without being interrupted by the LED code.
 
 The circuit:
 * LED attached from pin 13 to ground.
 * Note: on most Arduinos, there is already an LED on the board
 that's attached to pin 13, so no hardware is needed for this example.
 
 
 created 2005
 by David A. Mellis
 modified 8 Feb 2010
 by Paul Stoffregen
 
 This example code is in the public domain.

 
 http://www.arduino.cc/en/Tutorial/BlinkWithoutDelay
 */

// constants won't change. Used here to
// set pin numbers:
const int ledPin =  13;      // the number of the LED pin
#define PIEZOTHRESHOLD 5  // analog threshold for piezo sensing
#define PADNUM 3          // number of pads


// Variables will change:
int ledState = LOW;             // ledState used to set the LED
long previousMillis = 0;        // will store last time LED was updated

// the follow variables is a long because the time, measured in miliseconds,
// will quickly become a bigger number than can be stored in an int.
long interval = 100;           // interval at which to blink (milliseconds)

void setup() {
  // set the digital pin as output:
  pinMode(ledPin, OUTPUT);      
}

void loop()
{
  
  /*
 * Ardrumo sketch
 *
 * Use with the Ardrumo software here:
 * http://code.google.com/p/ardrumo/
 * This is designed to let an Arduino act as a drum machine
 * in GarageBand (sorry, Mac OS X only).
 */
#define PIEZOTHRESHOLD 5  // analog threshold for piezo sensing
#define PADNUM 3          // number of pads



int val;


  // Loop through each piezo and send data
  // on the serial output if the force exceeds
  // the piezo threshold
  for(int i = 0; i < PADNUM; i++) {
    val = analogRead(i);
    if( val >= PIEZOTHRESHOLD ) {
      Serial.print(i);
      Serial.print(",");
      Serial.print(val);
      Serial.println();
    }
  }



  
  // here is where you'd put code that needs to be running all the time.

  // check to see if it's time to blink the LED; that is, if the
  // difference between the current time and last time you blinked
  // the LED is bigger than the interval at which you want to
  // blink the LED.
  unsigned long currentMillis = millis();
 

 
   if(currentMillis - previousMillis > interval) {
    // save the last time you blinked the LED
    previousMillis = currentMillis;  

    // if the LED is off turn it on and vice-versa:
    if (ledState == LOW)
      ledState = HIGH;
    else
      ledState = LOW;

    // set the LED with the ledState of the variable:
    digitalWrite(ledPin, ledState);
  }
}

[Reply #19 on:]

This is the combined sketched I tried but no sound came out

Could that be because there's nothing in that sketch that would actually cause anything to make a sound?

[Reply #20 on:]

Here we go, The final code we used to make our shell change color and respond by vibrating when you put it up to your ear to listen to it. Credit for the code has to go to Groove, thanks again.  

Code:

const int LDRpin = 0; // analog pin 0 (connect LDR here)
const int LEDpin  = 13; //This is the LED

int threshold = 250;// a threshold to decide when the LED turns on

// RGB LED - Automatic Color Cycling
const int redPin = 11;
const int bluePin = 10;
const int greenPin = 9;

int redVal   = 255;
int greenVal = 255;
int blueVal  = 255;

void setup()
{
  update();
  pinMode(LEDpin, OUTPUT);
  Serial.begin(9600);// begin sending over serial port
}

// This function updates the LED outputs.
void update()
{
  analogWrite(redPin, redVal);
  analogWrite(greenPin, greenVal);
  analogWrite(bluePin, blueVal);
}

// This function updates one of the color variables
// either getting brighter or getting dimmer.
// It also updates the outputs and delays for 10 milliseconds.
void color_morph(int& value, int get_brighter)
{
  for (int i = 0; i < 255; i++)
  {
    if (get_brighter)
      value--;
    else
      value++;

    update();
    //    delay(10);
  // read the value on analog input
  int LDR_val = analogRead(LDRpin);
  // if value greater than threshold turn on LED
  if (LDR_val > threshold)
    digitalWrite(LEDpin, HIGH);
  else
    digitalWrite(LEDpin, LOW);

  // output 'LDR_val' value into the console
  Serial.print("LDR = ");
  Serial.print(LDR_val);
  }
}

void loop()
{
  // read the value on analog input
  int LDRval = analogRead(LDRpin);
  // if value greater than threshold turn on LED
  if (LDRval > threshold)
    digitalWrite(LEDpin, HIGH);
  else
    digitalWrite(LEDpin, LOW);

  Serial.print("LDR = ");
  Serial.println(LDRval);

  // start out at black (all off)
  color_morph(redVal,   1); // transition to red
  color_morph(greenVal, 1); // transition to yellow
  color_morph(redVal,   0); // transition to green
  color_morph(blueVal,  1); // transition to aqua
  color_morph(redVal,   1); // transition to white
  color_morph(greenVal, 0); // transition to violet
  color_morph(redVal,   0); // transition to blue
  color_morph(blueVal,  0); // transition to black (all off)
}

Check out our blog at http://interactivearduino.wordpress.com/ to see the full project.

[Reply #21 on:]

Hi,

I got problem to combine 2 sketches. The 1st sketches as below:

//void setup()
{
  // Setup serial
  Serial.begin(9600);
}void loop()
{
   Serial.println(analogRead(0));
 
   delay(200);  // wait 200 milliseconds
}


This is actually a soil moisture sensor. I want to make the output for this sensor as an analog input to blink three LED as stated below:

wet soil: 400-600 (GREEN LED)
in between: 200-400 (YELLOW LED)
dry soil: 0-200 (RED LED)

The 0-600 as stated above are the result that I get from the 1st sketches.I hope somebody can help me to get a right coding for my project because I'm very weak in this part

Thank You