Week 11

Individual extra assignment
Once I measure the power consumption of the LED RGB as one, I asked my instructor if it was the same for each color. However as this led works with 3 different colors that need 3 different pins, the power is not the same. Each color needs its own power. So I made another measure by myself to be sure about the power of its color.

R G B powerconsumption

Diagram of how I measure each led

To measure each color I had to interrupt the circuit between the color pin. So I extended the circuit in a breadboard and make this diagram to identify the different energy consumption each led makes following this diagram:

Diagram of how I measure each led

I identify 3 moments to measure: Each led directly to VCC, resistance between each led and their pins, and the energy difference between each resistance and VCC.

	voltage	LED	LED + R
Red	1.38 v	0.46	0.46
Blue	3.3 v	1.77	2
Green	3.3 v	1.77	3.67

CONCLUSION:
For the led rgb each color makes an specific energy consumption to show its color. It is different to measure each part of the circuit since each component makes something specific. And all this is important to make sure the energy supplier is enough.

PCB design process
From weeks before I fabricated from the schemtic design the board for two leds. I had some problems soldering the components as it is really small but I did my best at the end.

Magenta I want to find a variation of magenta from more intense to less intense pink. So I made the code to decrease green in steps of 25 in 10 changes of color between 1 sec.

10 changes of magenta in 10 seconds

int ledRojo = 10;
int ledVerde = 9;
int ledAzul = 8;

void setup() {
  pinMode(ledRojo, OUTPUT);
  pinMode(ledVerde, OUTPUT);
  pinMode(ledAzul, OUTPUT);
}

void loop() {
  // PINK
  analogWrite(ledRojo, 0);   //  MAX
  analogWrite(ledVerde, 200); //  LITTLE GREEN
  analogWrite(ledAzul, 0);   //  MAX
  delay(2000);

  // PURPLE
  analogWrite(ledRojo, 150);  //  MEDIUM RED
  analogWrite(ledVerde, 255); //  OFF
  analogWrite(ledAzul, 50);    //  MUCH BLUE
  delay(2000);

  // BLUE
  analogWrite(ledRojo, 200);  //  MEDIUM RED
  analogWrite(ledVerde, 255);  //  OFF
  analogWrite(ledAzul, 0);   //  MAX
  delay(2000);
}
 

Color picks for the palette

For fading the color change I ask chat gpt how I can make the color change better than just looping between 2 seconds with this prompt:

I have this code and I want it to change color between each code smooth: void loop() { // PINK analogWrite(ledRojo, 0); analogWrite(ledVerde, 200); analogWrite(ledAzul, 0); delay(2000); // PURPLE analogWrite(ledRojo, 150); analogWrite(ledVerde, 255); analogWrite(ledAzul, 50); delay(2000); // BLUE analogWrite(ledRojo, 200); analogWrite(ledVerde, 255); analogWrite(ledAzul, 0); delay(2000); }

I found out this is the main code why it makes the color fade after finding the intermediate color of each combination:

int ledRojo = 10;
int ledVerde = 9;
int ledAzul = 8;

void setup() {
  pinMode(ledRojo, OUTPUT);
  pinMode(ledVerde, OUTPUT);
  pinMode(ledAzul, OUTPUT);
}

// fade to color
void fadeToColor(int r1, int g1, int b1, int r2, int g2, int b2, int steps, int delayTime) {
  for (int i = 0; i <= steps; i++) {
    // intermediate color between each
    int r = map(i, 0, steps, r1, r2);
    int g = map(i, 0, steps, g1, g2);
    int b = map(i, 0, steps, b1, b2);

    // apply this value to each color
    analogWrite(ledRojo, r);
    analogWrite(ledVerde, g);
    analogWrite(ledAzul, b);

    delay(delayTime);
  }
}

void loop() {
  // PINK TO PURPLE
  fadeToColor(0, 200, 0, 150, 255, 50, 100, 20);  // 100 pasos, 20ms de delay
  delay(1000);  // Pausa de 1 segundo al final de la transición

  // PURPLE TO BLUE
  fadeToColor(150, 255, 50, 200, 255, 0, 100, 20);
  delay(1000);

  // BLUE TO PINK
  fadeToColor(200, 255, 0, 0, 200, 0, 100, 20);
  delay(1000);
}
 

Fading 3 main colors

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What's next?

1. The light is too intense. I need to find a way to fade this to the eye. I can make a traslucent case of resin or maybe transparent PLA to try to smooth this light.
2. Make the microphone board and try it.

Update. Week 14

I have been trying materials to see which difuses the light the better to make the case for the leds that will be the modules od my final lightstick.

I tried with Aqua Clear 8K Resin:

And with transparent PolyLite PETG:

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F I L E S

1. PCB rgb led board
2. Schematic rgb led board
3. Pcb board treadmills
4. Pcb board edge cuts
5. Magenta intensity code
6. 3 main color palette
7. Fading color palette
8. Resin Chitubox code
9. PETG Stl