Add example 'Taster' for LinuxWochen Linz workshop

Taster/Taster.ino

+/* Taster.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/>.
+ */
+
+// Der Eingangs-Pin des Tasters
+const int ButtonPin = 2;
+
+// Der Ausgangs-Pin der LED
+const int LEDPin = 11;
+
+
+void setup()
+{
+    pinMode(ButtonPin, INPUT);
+    pinMode(LEDPin, OUTPUT);
+}
+
+
+void loop()
+{
+    int state = digitalRead(ButtonPin);
+    digitalWrite(LEDPin, state);
+
+    delay(10);
+}
+
+
+/* IDEEN:
+   1. Erweitere das Programm so, dass mit Druck auf die Taste zwischen den
+      drei Zuständen LED dunkel -- LED blinkt -- LED hell gewechselt wird.
+   2. Erweitere das Programm so, dass die Zeit des Tastendrucks gemssen wird.
+      Die LED soll danach genau im Intervall der gemessenen Zeit blinken.
+*/