Output Devices

Introduction

Projects

I used a multimeter to measure the power consumption of my led strips.

Using the formula P = V x I

Example: P = 4.9v, V = 0.06A, We can find I (Watts) with I = P x V

I = 4.9v x 0.06A = 0.294W

Item list

	4.9v
Fire	0.06A	0.294W
Red	0.11A	0.539W
Yellow	0.19A	0.931W
Greenish Yellow	0.24A	1.176W
Green	0.11A	0.539W
Blue	0.11A	0.539W
Purple	0.09A	0.441W
White	0.28A	0.372W

From my measurements I can tell that different colors have different power consumtion. I used the program that was on the chip from week 8. It also gave me knowledge to use in later weeks.

---

programming: Board

Arduino Programming used for board. I used Xiao ESP32-C3 with these instructions SeeedStudio. to program the chip with Arduino. The Board I was using was designed during the Electronic Design week.

I wrote the program from scratch using Arduino with a little help from my instructor and ChatGPT. Inititally I hadfire animation in the code but I removed it for the Final Project.

More on week 8

---

Arduino program>

I used the program that was already on the chip from week 8. I changed the pin placement to match the XIAO.

---

plexiLamp_multipleLightThemes

#include 
#ifdef __AVR__
 #include  // Required for 16 MHz Adafruit Trinket
#endif

#define PIXEL_PIN    D7
#define BUTTON_PIN   D5
#define PIXEL_COUNT  10

Adafruit_NeoPixel strip(PIXEL_COUNT, PIXEL_PIN, NEO_GRB + NEO_KHZ800);

bool modeChanged = false; 
int mode = 0; // 0 for flame, 1 for rainbow, 2-8 for solid colors, 9 for off
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);

  strip.begin();
  strip.show();
  pinMode(BUTTON_PIN, INPUT_PULLUP);
}

void loop() {
  int reading = digitalRead(BUTTON_PIN);

  // Check button state and debounce
  if (reading == LOW) {
    if ((millis() - lastDebounceTime) > debounceDelay) {
      if (!modeChanged) {
        mode++;
        modeChanged = true;
        if (mode > 9) { // Update the maximum mode number
          mode = 0;
        }
        Serial.print("Mode changed to: ");
        Serial.println(mode);
      }
      lastDebounceTime = millis(); // Reset the debouncing timer
    }
  } else {
    modeChanged = false; // Reset mode changed flag when button is not pressed
  }

  switch (mode) {
    case 0:
      Serial.println("Fire");

      fireAnimation(75);
      break;
    case 1:
      Serial.println("Rainbow");

      rainbowAnimation();
      break;
    default:
      if (mode >= 2 && mode <= 8) {
        Serial.println("Colors");

        solidColor(mode - 2);
      } else if (mode == 9) {
        Serial.println("Off");

        turnOffLights();
      }
      break;
  }
}

void fireAnimation(int wait) {
  // First loop: Set the initial color for each LED
  for (int i = 0; i < strip.numPixels(); i++) {
    int r = random(150, 255); // More red for a fiery color
    int g = random(0, 85);    // Random amount of green to vary between red and yellow
    int b = 0;                // No blue component for fire

    strip.setPixelColor(i, r, g, b);
  }

  // Second loop: Apply the flicker effect
  for (int i = 0; i < strip.numPixels(); i++) {
    uint32_t color = strip.getPixelColor(i);
    int r = (color >> 16) & 0xFF;
    int g = (color >> 8) & 0xFF;

    // Random flicker effect
    int flicker = random(0, 150);
    r = max(0, r - flicker);
    g = max(0, g - flicker);

    strip.setPixelColor(i, r, g, 0);
  }

  strip.show();
  delay(wait);
}

void rainbowAnimation() {
  static unsigned long lastUpdate = 0; // Last update time
  static uint16_t j = 0; // Position in color wheel

  // Update only if the appropriate interval has passed
  if (millis() - lastUpdate > 20) {
    for (int i = 0; i < strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel((i + j) & 255));
    }
    strip.show();

    j = (j + 1) % 256; // Move to the next position in the color wheel
    lastUpdate = millis(); // Update the last update time
  }
}


// Input a value 0 to 255 to get a color value.
// The colors are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if(WheelPos < 85) {
    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  }
  if(WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
  WheelPos -= 170;
  return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}

void solidColor(int color) {
  uint32_t col;

  switch(color) {
    case 0: col = strip.Color(255, 0, 0); break; // Red
    case 1: col = strip.Color(255, 165, 0); break; // Orange
    case 2: col = strip.Color(255, 255, 0); break; // Yellow
    case 3: col = strip.Color(0, 255, 0); break; // Green
    case 4: col = strip.Color(0, 0, 255); break; // Blue
    case 5: col = strip.Color(75, 0, 130); break; // Indigo
    case 6: col = strip.Color(238, 130, 238); break; // Violet
    default: col = strip.Color(0, 0, 0); break; // Off
  }

  for(int i = 0; i < strip.numPixels(); i++) {
    strip.setPixelColor(i, col);
  }
  strip.show();
}

void turnOffLights() {
  for(int i = 0; i < strip.numPixels(); i++) {
    strip.setPixelColor(i, strip.Color(0, 0, 0)); // Turn off this LED
  }
  strip.show();
}