diff --git a/Knob_serial.ino b/Knob_serial.ino
new file mode 100644
index 0000000..7261b7e
--- /dev/null
+++ b/Knob_serial.ino
@@ -0,0 +1,21 @@
+
+#include <Servo.h>
+
+Servo myservo;  // create servo object to control a servo
+
+
+String val;    
+int pos;
+void setup() {
+  myservo.attach(9); 
+  Serial.begin(9600);
+}
+
+void loop() {
+  if(Serial.available()){            
+  val = Serial.readString();  // Read String from Serial    
+  pos=val.toInt();           // Converting Serial to Integer
+  pos=map(pos,0,500,180,0);  // maping value from 0 - 500 to 180 - 0
+  myservo.write(pos);        // finally writing the pulse to the servo          
+  }
+}