Add example 'LEDBalken' for LinuxWochen Linz workshop

LEDBalken/LEDBalken.ino

+/* Lichtbalken.ino
+ *
+ * Copyright 2015 Roland Richter
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+int PotPin = A0;
+
+void setup()
+{
+    // Pins 3 bis 12 sind OUTPUT
+    for (int pos = 3; pos <= 12; ++pos) {
+        pinMode(pos, OUTPUT);
+    }
+}
+
+
+void loop()
+{
+    int value = analogRead(PotPin);
+    int show = map(value, 0, 1023, 0, 10);
+
+    for (int pos = 0; pos < 10; ++pos) {
+        digitalWrite(3 + pos, pos < show ? HIGH : LOW);
+    }
+}
+
+
+/* IDEEN:
+    1. Ändere die Anzeige so, dass immer nur eine LED aufleuchtet und je nach
+    analogem Wert hin- und herwandert.
+*/