Unterschiede

Hier werden die Unterschiede zwischen zwei Versionen angezeigt.

--- digitalelektronik:moving-light [2015/02/12 08:25] – angelegt ros
+++ digitalelektronik:moving-light [2020/10/13 14:25] (aktuell) – Externe Bearbeitung 127.0.0.1
@@ Zeile 9: / Zeile 9: @@
 <code c++>
 const int DELAY_MS = 500;
-const int PIN[] = { 2, 3, 4, 5, 6, 7, 8, 9 };
-const int PIN_COUNT = sizeof(PIN) / sizeof(int);
+const int PIN[] = { 2, 3, 4, 5 };
+const int PIN_COUNT = 4;
 int currentLed;
@@ Zeile 26: / Zeile 28: @@
 void loop() {
     digitalWrite(PIN[currentLed], LOW);
-    currentLed = (currentLed + 1) % PIN_COUNT;
+    currentLed = currentLed + 1;
+    if (PIN_COUNT <= currentLed) {
+        currentLed = 0;
+    }
     digitalWrite(PIN[currentLed], HIGH);
     delay(DELAY_MS);
@@ Zeile 33: / Zeile 39: @@
 ==== Hin- und herbewegendes Lauflicht ====
+Bei dieser Variante bewegt sich das Lauflicht hin und her.
 <code c++>
 const int DELAY_MS = 100;
 const int PIN[] = { 2, 3, 4, 5, 6, 7, 8, 9 };
-const int PIN_COUNT = sizeof(PIN) / sizeof(int);
+const int PIN_COUNT = 8;
 int currentLed;
 int dir;
@@ Zeile 66: / Zeile 75: @@
 </code>
+==== Harmonische Schwingung ====
+Bei dieser Variante stellt die Bewegung eine harmonische Schwingung dar.
+<code c++>
+const int DELAY_MS = 100;
+const int PIN[] = { 2, 3, 4, 5, 6, 7, 8, 9 };
+const int PIN_COUNT = 8;
+int currentLed;
+int dir;
+void setup() {
+    int i = 0;
+    while (i < PIN_COUNT) {
+        pinMode(PIN[i], OUTPUT);
+        i = i + 1;
+    }
+    currentLed = 0;
+    dir = 1;
+}
+void loop() {
+    digitalWrite(PIN[currentLed], LOW);
+    currentLed = currentLed + dir;
+    if (currentLed < 0 || PIN_COUNT <= currentLed) {
+        dir = -dir;
+        currentLed = currentLed + dir;
+    }
+    digitalWrite(PIN[currentLed], HIGH);
+    double maxAmp = PIN_COUNT / 2.0;
+    double currAmp = currentLed - maxAmp;
+    delay(DELAY_MS * abs(sin(currAmp / maxAmp)) + 100);
+}
+</code>