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Ricardo S Ferreira

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posts postados por Ricardo S Ferreira

  1. @.if

    2 horas atrás, .if disse:

    E não ligue em cascata = o fim de uma alimentando a próxima. Derive as ligações de 1 par de pontos só.

    Impossível fazer isso. Se colocar a alimentação apenas em uma ponta da fita, se colocar todos os leds em branco, a partir da metade da fita (2,5m) começa a amarelar (experiência própria).

    Eu coloquei 2 fitas e meia no quarto da minha filha e precisei de uma fonte de 40A, levando os 5V para o início e em cada emenda para ficar todas as cores iguais.

    Creio que o grande problema do amigo é a colocação em paralelo de duas fontes.

    Depois que adquiri o material, vi que existe essa fita para 12V.

    Apesar de mais cara, vale a pena na questão alimentação. 

    • Obrigado 1
  2. @.if o grande problema que vejo aí, é que em led endereçável o programa envia um loop de 1 a n led, qual cor e qual intensidade.

    Segue um exemplo extraído da internet.

    Não achei a tag code...

     

    // NeoPixel test program showing use of the WHITE channel for RGBW

    // pixels only (won't look correct on regular RGB NeoPixel strips).

    #include <Adafruit_NeoPixel.h>

    #ifdef __AVR__

    #include <avr/power.h> // Required for 16 MHz Adafruit Trinket

    #endif

    // Which pin on the Arduino is connected to the NeoPixels?

    // On a Trinket or Gemma we suggest changing this to 1:

    #define LED_PIN 6

    // How many NeoPixels are attached to the Arduino?

    #define LED_COUNT 60

    // NeoPixel brightness, 0 (min) to 255 (max)

    #define BRIGHTNESS 50 // Set BRIGHTNESS to about 1/5 (max = 255)

    // Declare our NeoPixel strip object:

    Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRBW + NEO_KHZ800);

    // Argument 1 = Number of pixels in NeoPixel strip

    // Argument 2 = Arduino pin number (most are valid)

    // Argument 3 = Pixel type flags, add together as needed:

    // NEO_KHZ800 800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)

    // NEO_KHZ400 400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)

    // NEO_GRB Pixels are wired for GRB bitstream (most NeoPixel products)

    // NEO_RGB Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)

    // NEO_RGBW Pixels are wired for RGBW bitstream (NeoPixel RGBW products)

    void setup() {

    // These lines are specifically to support the Adafruit Trinket 5V 16 MHz.

    // Any other board, you can remove this part (but no harm leaving it):

    #if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)

    clock_prescale_set(clock_div_1);

    #endif

    // END of Trinket-specific code.

    strip.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)

    strip.show(); // Turn OFF all pixels ASAP

    strip.setBrightness(BRIGHTNESS);

    }

    void loop() {

    // Fill along the length of the strip in various colors...

    colorWipe(strip.Color(255, 0, 0) , 50); // Red

    colorWipe(strip.Color( 0, 255, 0) , 50); // Green

    colorWipe(strip.Color( 0, 0, 255) , 50); // Blue

    colorWipe(strip.Color( 0, 0, 0, 255), 50); // True white (not RGB white)

    whiteOverRainbow(75, 5);

    pulseWhite(5);

    rainbowFade2White(3, 3, 1);

    }

    // Fill strip pixels one after another with a color. Strip is NOT cleared

    // first; anything there will be covered pixel by pixel. Pass in color

    // (as a single 'packed' 32-bit value, which you can get by calling

    // strip.Color(red, green, blue) as shown in the loop() function above),

    // and a delay time (in milliseconds) between pixels.

    void colorWipe(uint32_t color, int wait) {

    for(int i=0; i<strip.numPixels(); i++) { // For each pixel in strip...

    strip.setPixelColor(i, color); // Set pixel's color (in RAM)

    strip.show(); // Update strip to match

    delay(wait); // Pause for a moment

    }

    }

    void whiteOverRainbow(int whiteSpeed, int whiteLength) {

    if(whiteLength >= strip.numPixels()) whiteLength = strip.numPixels() - 1;

    int head = whiteLength - 1;

    int tail = 0;

    int loops = 3;

    int loopNum = 0;

    uint32_t lastTime = millis();

    uint32_t firstPixelHue = 0;

    for(;;) { // Repeat forever (or until a 'break' or 'return')

    for(int i=0; i<strip.numPixels(); i++) { // For each pixel in strip...

    if(((i >= tail) && (i <= head)) || // If between head & tail...

    ((tail > head) && ((i >= tail) || (i <= head)))) {

    strip.setPixelColor(i, strip.Color(0, 0, 0, 255)); // Set white

    } else { // else set rainbow

    int pixelHue = firstPixelHue + (i * 65536L / strip.numPixels());

    strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue)));

    }

    }

    strip.show(); // Update strip with new contents

    // There's no delay here, it just runs full-tilt until the timer and

    // counter combination below runs out.

    firstPixelHue += 40; // Advance just a little along the color wheel

    if((millis() - lastTime) > whiteSpeed) { // Time to update head/tail?

    if(++head >= strip.numPixels()) { // Advance head, wrap around

    head = 0;

    if(++loopNum >= loops) return;

    }

    if(++tail >= strip.numPixels()) { // Advance tail, wrap around

    tail = 0;

    }

    lastTime = millis(); // Save time of last movement

    }

    }

    }

    void pulseWhite(uint8_t wait) {

    for(int j=0; j<256; j++) { // Ramp up from 0 to 255

    // Fill entire strip with white at gamma-corrected brightness level 'j':

    strip.fill(strip.Color(0, 0, 0, strip.gamma8(j)));

    strip.show();

    delay(wait);

    }

    for(int j=255; j>=0; j--) { // Ramp down from 255 to 0

    strip.fill(strip.Color(0, 0, 0, strip.gamma8(j)));

    strip.show();

    delay(wait);

    }

    }

    void rainbowFade2White(int wait, int rainbowLoops, int whiteLoops) {

    int fadeVal=0, fadeMax=100;

    // Hue of first pixel runs 'rainbowLoops' complete loops through the color

    // wheel. Color wheel has a range of 65536 but it's OK if we roll over, so

    // just count from 0 to rainbowLoops*65536, using steps of 256 so we

    // advance around the wheel at a decent clip.

    for(uint32_t firstPixelHue = 0; firstPixelHue < rainbowLoops*65536;

    firstPixelHue += 256) {

    for(int i=0; i<strip.numPixels(); i++) { // For each pixel in strip...

    // Offset pixel hue by an amount to make one full revolution of the

    // color wheel (range of 65536) along the length of the strip

    // (strip.numPixels() steps):

    uint32_t pixelHue = firstPixelHue + (i * 65536L / strip.numPixels());

    // strip.ColorHSV() can take 1 or 3 arguments: a hue (0 to 65535) or

    // optionally add saturation and value (brightness) (each 0 to 255).

    // Here we're using just the three-argument variant, though the

    // second value (saturation) is a constant 255.

    strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue, 255,

    255 * fadeVal / fadeMax)));

    }

    strip.show();

    delay(wait);

    if(firstPixelHue < 65536) { // First loop,

    if(fadeVal < fadeMax) fadeVal++; // fade in

    } else if(firstPixelHue >= ((rainbowLoops-1) * 65536)) { // Last loop,

    if(fadeVal > 0) fadeVal--; // fade out

    } else {

    fadeVal = fadeMax; // Interim loop, make sure fade is at max

    }

    }

    for(int k=0; k<whiteLoops; k++) {

    for(int j=0; j<256; j++) { // Ramp up 0 to 255

    // Fill entire strip with white at gamma-corrected brightness level 'j':

    strip.fill(strip.Color(0, 0, 0, strip.gamma8(j)));

    strip.show();

    }

    delay(1000); // Pause 1 second

    for(int j=255; j>=0; j--) { // Ramp down 255 to 0

    strip.fill(strip.Color(0, 0, 0, strip.gamma8(j)));

    strip.show();

    }

    }

    delay(500); // Pause 1/2 second

    }

     

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