Making Toys

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  Yury Gitman 7:04 pm on October 6, 2008 Permalink | Reply  

  Color Mixer with a Potentiometer and a Tri-Color LED 

  Here’s a short video of a color mixer I made using a tri-color led. I used the color mixer code from the Arduino site. To see the code, click the link at the bottom of the post.

  http://vimeo.com/moogaloop.swf?clip_id=1898480&server=vimeo.com&show_title=1&show_byline=0&show_portrait=0&color=00ADEF&fullscreen=1
  Color Mixer from Joana Kelly on Vimeo

  Color Mixer Insides

  

  This is the inside of the mixer. That’s the arduino on the left! Note I finally got that tri-color led working. Yesss! Turns out the short pin does go to power….good to know.

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• 

  Yury Gitman 4:32 pm on October 6, 2008 Permalink | Reply  

  Color Mixer [by Jenny] 

  http://vimeo.com/moogaloop.swf?clip_id=1878910&server=vimeo.com&show_title=1&show_byline=1&show_portrait=0&color=&fullscreen=1
  Color Mixer from Jennifer Dopazo on Vimeo.

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  Yury Gitman 4:23 pm on October 3, 2008 Permalink | Reply  

  Fuki’s Secret Inspiration 

  Ever since I was a child, I was  fascinated with things that were small.  There’s something  imaginative and fairytale-like when everyday-objects are transformed into miniatures.  Even with electrical objects like laptops, mp3 players and automobiles, the inner-child in me–and maybe in most of us?– becomes excited with things that are reduced in size.

  
  
  

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  Yury Gitman 1:18 am on October 1, 2008 Permalink | Reply  

  My color mixer 

  http://vimeo.com/moogaloop.swf?clip_id=1856128&server=vimeo.com&show_title=1&show_byline=1&show_portrait=0&color=&fullscreen=1
  my color mixer from maze on Vimeo.

  Materials: Arduino, jumper wires, potentiometer, 9v battery, LEDs, resistors, DC power plug, tracing paper, scotch tape, fiberfill

  Here is my code:
  /*
  *Color Mixer
  *Tzumei M. Hsiao
  *I modified the code from "Coffee-cup" color mixer on Arduino.cc
  */

  // Analog pin settings
  int potIn = 3;    // the potentiometer connected to the analog pin 3

  // Digital pin settings
  int redLED = 9;   // LEDs connected to digital pins 9, 10 and 11
  int blueLED = 10;  //   (Connect cathodes to digital ground)
  int greenLED = 11; 

  // Values
  int potVal = 0;   // the variable to store the input from the potentiometer
  int redVal = 0;   // the variable to store the value of red LED
  int greenVal = 0;  // the variable to store the value of green LED
  int blueVal = 0;  // the variable to store the value of blue LED

  // Variables for comparing values between loops
  int i = 0;            // Loop counter
  int wait = (1000);    // Delay between most recent pot adjustment and output

  int sens         = 3; // Sensitivity threshold, to prevent small changes in
                        // pot values from triggering false reporting
  // FLAGS
  int PRINT = 1; // Set to 1 to output values

  void setup()
  {
    pinMode(redLED, OUTPUT);   // sets the digital pins as output
    pinMode(blueLED, OUTPUT);   
    pinMode(greenLED, OUTPUT);
    Serial.begin(9600);     // Open serial communication for reporting
  }

  void loop()
  {
    i += 1; // Count loop

    potVal = analogRead(potIn);  // read input pins, convert to 0-255 scale

    if (potVal< 341)
    {
      potVal= (potVal* 3) / 4; //normalize to 0-255
      redVal= 255-potVal;
      greenVal= potVal;
      blueVal= 1; //blue off
    } //end of if
    else if (potVal< 682)
    {
      potVal= ((potVal-341)*3) / 4; //normalize to 0-255
      redVal= 1; //red off
      greenVal= 255-potVal;
      blueVal= potVal;
    } //end of else if
    else
    {
      potVal= ((potVal-682)*3)/ 4; //normalize to 0-255
      redVal= potVal;
      greenVal= 1; //green off
      blueVal= 255-potVal;
    } //end of else

    analogWrite(redLED, redVal);    // Send the new value to LEDs
    analogWrite(blueLED, blueVal);
    analogWrite(greenLED, greenVal);

    if (i % wait == 0)                // If enough time has passed…
    {   
      if ( potVal > sens )   // If old and new values differ
                                                    // above sensitivity threshold
      {
        if (PRINT)                    // …and if the PRINT flag is set…
        {
          Serial.print("The value of potentiometer: ");        // …then print the values.
          Serial.print(potVal);         

          PRINT = 0;
        }
      } 
      else
      {
        PRINT = 1;  // Re-set the flag   
      }

    }
  }

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