Added arduino libs

libraries/PID/examples/PID_Basic/PID_Basic.ino

@@ -0,0 +1,35 @@
+/********************************************************
+ * PID Basic Example
+ * Reading analog input 0 to control analog PWM output 3
+ ********************************************************/
+
+#include <PID_v1.h>
+
+#define PIN_INPUT 0
+#define PIN_OUTPUT 3
+
+//Define Variables we'll be connecting to
+double Setpoint, Input, Output;
+
+//Specify the links and initial tuning parameters
+double Kp=2, Ki=5, Kd=1;
+PID myPID(&Input, &Output, &Setpoint, Kp, Ki, Kd, DIRECT);
+
+void setup()
+{
+  //initialize the variables we're linked to
+  Input = analogRead(PIN_INPUT);
+  Setpoint = 100;
+
+  //turn the PID on
+  myPID.SetMode(AUTOMATIC);
+}
+
+void loop()
+{
+  Input = analogRead(PIN_INPUT);
+  myPID.Compute();
+  analogWrite(PIN_OUTPUT, Output);
+}
+
+