Drehlicht eingebaut

Bsp3_Pixelkreis/Bsp3_Pixelkreis.ino

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+#include <Adafruit_NeoPixel.h>
+#define PIN 2 // Hier wird angegeben, an welchem digitalen Pin die WS2812 LEDs bzw. NeoPixel angeschlossen sind
+#define NUMPIXELS 16 // Hier wird die Anzahl der angeschlossenen WS2812 LEDs bzw. NeoPixel angegeben
+Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
+
+const int PAUSE_MS = 50;
+
+const auto BLACK = pixels.Color(0,0,0);
+const auto RED = pixels.Color(128,0,0);
+const auto GREEN = pixels.Color(0,128,0);
+const auto BLUE = pixels.Color(0,0,128);
+const auto YELLOW = pixels.Color(128,128,0);
+const auto WHITE = pixels.Color(128,128,128);
+
+const int RED_STEP = 92/NUMPIXELS;
+const int RED_MIN = 8;
+
+bool red_up;
+int red_value;
+
+void setup(void) {
+	pixels.begin();
+	
+	red_value = RED_MIN;
+	red_up = true;
+}
+
+void loop() {
+	for (int i=0; i<NUMPIXELS; i++) {
+		if (red_up) {
+			red_value = red_value + RED_STEP;
+		}
+		else {
+			red_value = red_value - RED_STEP;
+		}
+		
+		set_all_pixels(pixels.Color(red_value, 0, 0));
+		
+		int j = (i+NUMPIXELS/2)%NUMPIXELS;
+		pixels.setPixelColor(i, GREEN);
+		pixels.setPixelColor(j, BLUE);
+		pixels.show();
+		
+		delay(100);
+		set_all_pixels(BLACK);
+	}
+	
+	red_up = !red_up;
+}
+
+void show(uint32_t color) {
+	set_all_pixels(color);
+	pixels.show();
+	
+	delay(PAUSE_MS);
+}
+
+void set_all_pixels(uint32_t color) {
+	for (int i=0; i<NUMPIXELS; i++) {
+		pixels.setPixelColor(i, color);
+	}
+}