Added arduino files

C++/Arduino/Serial_LCD/Serial_LCD.ino

@@ -0,0 +1,19 @@
+#include <LiquidCrystal.h>
+
+const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
+LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
+
+void setup() {
+  lcd.begin(16, 2);
+  lcd.print("Time since power");
+}
+
+void loop() {
+  lcd.setCursor(0, 1);
+  lcd.print(millis() / 1000);
+
+  lcd.setCursor(10, 1);
+  lcd.print(counter);
+
+  counter++;
+}