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HW 6: Walk the dog

jennifer_wang's picture
Tue, 10/11/2011 - 21:22 — jennifer_wang

Description:

I created a stuffed dog that will walk when you press the force sensor.  It also barks when it walks.

Watch at http://www.youtube.com/watch?v=_iZie2M8x8M.

Materials:

  • Force sensitive resistor
  • DC motor
  • TIP120 transistor
  • 1N4004 diode
  • 1k ohm resistor
  • 10k ohm resistor
  • Fabric
  • Thread
  • Stuffing
  • Rubberbands

Processing Code:

 

/* Jennifer Wang
 * HW 6
 * October 11, 2011
 *
 * Walk the dog bark
 * Make the dog bark when the dog starts walking (sensor turned on)
 * 
 * Use with arduino potControlsMotor code
 *
 */
 
import ddf.minim.*;
import processing.serial.*;
 
Minim minim;
AudioPlayer bark;
AudioInput input;
AudioOutput out;
 
float gain = -60; // gain between -60 and 5
 
Serial port;
 
int sensorVal; // value from force sensor
 
// ** calibrate the low and high values of the sensor to get full range **
int sensorLow = 100;
int sensorHigh = 490;
 
void setup() {
  println(Serial.list()); // List COM-ports
 
  //select second com-port from the list
  port = new Serial(this, Serial.list()[0], 9600); 
  size(100, 100);
 
  minim = new Minim(this);
  bark = minim.loadFile("Sound Effect - Dog Barking 04.wav");
  input = minim.getLineIn();
  out = minim.getLineOut(); // returns a stereo line out with buffer size of 
                            // 1024 samples that plays 16 bit audio at 44100 Hz sample rate
  
  bark.loop();
  bark.setGain(gain);
}
 
void draw() {
  bark.setGain(gain);
}
 
void stop() {
  // the AudioPlayer you got from Minim.loadFile()
  bark.close();
  // the AudioInput you got from Minim.getLineIn()
  input.close();
  minim.stop();
 
  // this calls the stop method that 
  // you are overriding by defining your own
  // it must be called so that your application 
  // can do all the cleanup it would normally do
  super.stop();
}
 
 
void serialEvent(Serial p) {
   // get the ASCII string:
 String inString = port.readStringUntil('\n');
 
 if (inString != null) {
   // trim off any whitespace:
   inString = trim(inString);
   
   // convert to integer
   sensorVal = int(inString);
   
   // bark if sensor is turned on (in transition fron off to on)
   if (sensorVal > sensorLow & gain == -60) {
     println("bark");
     //bark.unmute();
     gain = 5;
   }
   // bark if sensor is turned off (in transition from on to off)
   else if (sensorVal < sensorLow & gain == 5) {
     println("no bark");
     //bark.mute();
     gain = -60;
   }
 }
}
HW6 Dog
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