diff --git a/Code/C_Code/07.1.1_PCF8591/PCF8591.c b/Code/C_Code/07.1.1_ADC/ADC.c
similarity index 93%
rename from Code/C_Code/07.1.1_PCF8591/PCF8591.c
rename to Code/C_Code/07.1.1_ADC/ADC.c
index 44816a0..0dbccfc 100644
--- a/Code/C_Code/07.1.1_PCF8591/PCF8591.c
+++ b/Code/C_Code/07.1.1_ADC/ADC.c
@@ -1,8 +1,8 @@
 /**********************************************************************
-* Filename    : PCF8591.c
+* Filename    : ADC.c
 * Description : ADC and DAC
 * Author      : freenove
-* modification: 2016/06/14
+* modification: 2018/09/15
 **********************************************************************/
 
 #include <wiringPi.h>
diff --git a/Code/C_Code/07.1.1_PCF8591/PCF8591 b/Code/C_Code/07.1.1_PCF8591/PCF8591
deleted file mode 100644
index 2b121f6..0000000
Binary files a/Code/C_Code/07.1.1_PCF8591/PCF8591 and /dev/null differ
diff --git a/Code/Python_Code/07.1.1_PCF8591/PCF8591.py b/Code/Python_Code/07.1.1_ADC/ADC.py
similarity index 94%
rename from Code/Python_Code/07.1.1_PCF8591/PCF8591.py
rename to Code/Python_Code/07.1.1_ADC/ADC.py
index e4381fb..d33e46a 100644
--- a/Code/Python_Code/07.1.1_PCF8591/PCF8591.py
+++ b/Code/Python_Code/07.1.1_ADC/ADC.py
@@ -1,9 +1,9 @@
 #!/usr/bin/env python3
 #############################################################################
-# Filename    : PCF8591.py
+# Filename    : ADC.py
 # Description : ADC and DAC
 # Author      : freenove
-# modification: 2018/08/02
+# modification: 2018/09/15
 ########################################################################
 import smbus
 import time
diff --git a/Tutorial.pdf b/Tutorial.pdf
index e73ae36..07a3f1e 100644
Binary files a/Tutorial.pdf and b/Tutorial.pdf differ