diff --git a/arduino_lite/analog.h b/arduino_lite/analog.h
index 10aa62f..f71e3c4 100644
--- a/arduino_lite/analog.h
+++ b/arduino_lite/analog.h
@@ -1,3 +1,23 @@
+/*
+ * analog.h
+ *
+ * Lightweight macro implementation of Arduino style pin numbering
+ * for AVR microprocessors. Because only thing I want to use from
+ * Arduino libraries is the pin numbering scheme.
+ * 
+ * This file taken 99% from the excellent ArduinoLite project by 
+ * Shikai Chen <csk@live.com>. Some minor changes to suite my personal 
+ * coding taste.
+ *
+ *   http://code.google.com/p/arduino-lite/
+ *   http://www.csksoft.net/
+ *
+ * Copyright (c) 2010-2011 Shikai Chen
+ *
+ * Licensed under the LGPL 2.1 license:
+ *   http://www.opensource.org/licenses/lgpl-2.1.php
+ */
+
 #ifndef ANALOG_H
 #define ANALOG_H
 #include "pins.h"
diff --git a/arduino_lite/digital.h b/arduino_lite/digital.h
index 9831cd8..6d1acd5 100644
--- a/arduino_lite/digital.h
+++ b/arduino_lite/digital.h
@@ -1,3 +1,23 @@
+/*
+ * digital.h
+ *
+ * Lightweight macro implementation of Arduino style pin numbering
+ * for AVR microprocessors. Because only thing I want to use from
+ * Arduino libraries is the pin numbering scheme.
+ * 
+ * This file taken 99% from the excellent ArduinoLite project by 
+ * Shikai Chen <csk@live.com>. Some minor changes to suite my personal 
+ * coding taste.
+ *
+ *   http://code.google.com/p/arduino-lite/
+ *   http://www.csksoft.net/
+ *
+ * Copyright (c) 2010-2011 Shikai Chen
+ *
+ * Licensed under the LGPL 2.1 license:
+ *   http://www.opensource.org/licenses/lgpl-2.1.php
+ */
+
 #ifndef DIGITAL_H
 #define DIGITAL_H
 #include "pins.h"
diff --git a/arduino_lite/main.c b/arduino_lite/main.c
index 49d0deb..192d04f 100644
--- a/arduino_lite/main.c
+++ b/arduino_lite/main.c
@@ -1,7 +1,8 @@
 /*
- * Digital read 8bit data from PORTD3..7 PORTD0..1 (Arduino digital ports 3..9)
- * and output it as binary string (10001101) to serial. Floating state is high. 
- * Connect pin to ground to set it low.
+ * Digital read 8bit data from Arduino digital ports 2..9 using fast macro 
+ * implentation of pin numbering from ArduinoLite project. Output value 
+ * as binary string (10001101) to serial. Floating state is high. Connect pin 
+ * to ground to set it low.
  * 
  * Led at Arduino digital 13 (PORTB5). Cause we all love blinken leds!
  *
diff --git a/arduino_lite/pins.h b/arduino_lite/pins.h
index e6a3829..274b592 100644
--- a/arduino_lite/pins.h
+++ b/arduino_lite/pins.h
@@ -1,18 +1,21 @@
 /*
- *  ArduinoLite 
- *  A lightweight runtime system for AVR chips
- *  by Shikai Chen (csk@live.com, http://www.csksoft.net)
+ * pins.h
  *
- *  pins_arduino_lit.h - Static Arduino Pin to AVR Pin mapping table
+ * Lightweight macro implementation of Arduino style pin numbering
+ * for AVR microprocessors. Because only thing I want to use from
+ * Arduino libraries is the pin numbering scheme.
+ * 
+ * This file taken 99% from the excellent ArduinoLite project by 
+ * Shikai Chen <csk@live.com>. Some minor changes to suite my personal 
+ * coding taste.
  *
- *  ArduinoLite is based on the work of Arduino Project (arduino.cc) 
+ *   http://code.google.com/p/arduino-lite/
+ *   http://www.csksoft.net/
  *
- *  Support AVR Chips
- *  Atmega8
- *  Atmegax8 series: Atmega48 Atmega88 Atmega168 ...
- *  Attiny2313
- *  Attiny26
- *  Atmega1280 (not vaildated yet)
+ * Copyright (c) 2010-2011 Shikai Chen
+ *
+ * Licensed under the LGPL 2.1 license:
+ *   http://www.opensource.org/licenses/lgpl-2.1.php
  */
 
 #ifndef PINS_H