简介
这是一款8x8 RGB全彩LED点阵模块,支持单总线控制,仅需一根管脚即可控制所有LED,并且模块支持级联控制,可以多个模块同时控制,不占用管脚资源。模块采用LED专用主控芯片WS2812,每个LED拥有独立地址位,可以单独控制,并且每一个RGB像素点可实现256级亮度显示,完成16777216种颜色显示,扫描频率不低于400Hz。
每个模块支持级联控制,可以把第二个模块的DIN接到第一个模块的DOUT的位置,以此类推,把所有的模块串接起来,组成一个更大的屏幕!当然4块以上就建议使用外接电源了。
注意:每个LED最大需要18mA电流。多个模块同时使用时,建议使用外部供电,可根据级联的数量选择5V@1A,5V@2A,5V@5A,甚至5V@10A的外接供电。
技术规格
- 工作电压:5V
- 功 率:0.3W/颗
- 灯珠型号:WS2812
- 光 源:SMD 5050 RGB
- 灰度等级:256级
- 发光角度:180°
- 发光颜色: 白、红、黄、蓝、绿等各种灯光模式
- 产品尺寸:65*65 mm
- 通信接口:单线控制
- 工作温度:-25~+80℃
- 防水等级:不防水
引脚说明
灯板背面缩率图:
标号 | 名称 | 功能描述 |
---|---|---|
1 | 5V | 电源正极 |
2 | GND | 电源负极 |
3 | DIN | 控制信号输入端 |
4 | DOUT | 控制信号输出端,用于级联到下一个灯板的DIN脚 |
表名
使用教程
本教程是实现灯效的幻彩控制
准备
- 硬件
- 1 x UNO控制板
- 1 x 8x8 RGB LED Matrix
- 若干 杜邦线
- 软件
- Arduino IDE , 点击下载Arduino IDE
接线图
样例代码
点击下载库文件Arduino库(Github)。如何安装库?
#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h>
#endif
#define PIN 6
// Parameter 1 = number of pixels in strip
// Parameter 2 = Arduino pin number (most are valid)
// Parameter 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)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(64, PIN, NEO_GRB + NEO_KHZ800);
// IMPORTANT: To reduce NeoPixel burnout risk, add 1000 uF capacitor across
// pixel power leads, add 300 - 500 Ohm resistor on first pixel's data input
// and minimize distance between Arduino and first pixel. Avoid connecting
// on a live circuit...if you must, connect GND first.
void setup() {
// This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket
#if defined (__AVR_ATtiny85__)
if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
#endif
// End of trinket special code
strip.begin();
strip.show(); // Initialize all pixels to 'off'
}
void loop() {
// Some example procedures showing how to display to the pixels:
//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); // White RGBW
// Send a theater pixel chase in...
// theaterChase(strip.Color(127, 127, 127), 50); // White
//theaterChase(strip.Color(127, 0, 0), 50); // Red
//theaterChase(strip.Color(0, 0, 127), 50); // Blue
rainbow(20);
//rainbowCycle(20);
//theaterChaseRainbow(50);
}
// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
for(uint16_t i=0; i<strip.numPixels(); i++) {
strip.setPixelColor(i, c);
strip.show();
delay(wait);
}
}
void rainbow(uint8_t wait) {
uint16_t i, j;
for(j=0; j<256; j++) {
for(i=0; i<strip.numPixels(); i++) {
strip.setPixelColor(i, Wheel((i+j) & 255));
}
strip.show();
delay(wait);
}
}
// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
uint16_t i, j;
for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
for(i=0; i< strip.numPixels(); i++) {
strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
}
strip.show();
delay(wait);
}
}
//Theatre-style crawling lights.
void theaterChase(uint32_t c, uint8_t wait) {
for (int j=0; j<10; j++) { //do 10 cycles of chasing
for (int q=0; q < 3; q++) {
for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
strip.setPixelColor(i+q, c); //turn every third pixel on
}
strip.show();
delay(wait);
for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
strip.setPixelColor(i+q, 0); //turn every third pixel off
}
}
}
}
//Theatre-style crawling lights with rainbow effect
void theaterChaseRainbow(uint8_t wait) {
for (int j=0; j < 256; j++) { // cycle all 256 colors in the wheel
for (int q=0; q < 3; q++) {
for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
strip.setPixelColor(i+q, Wheel( (i+j) % 255)); //turn every third pixel on
}
strip.show();
delay(wait);
for (uint16_t i=0; i < strip.numPixels(); i=i+3) {
strip.setPixelColor(i+q, 0); //turn every third pixel off
}
}
}
}
// Input a value 0 to 255 to get a color value.
// The colours 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);
}
结果
灯板显示彩色
常见问题
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