diff --git a/code/piplayer2.py b/code/piplayer2.py
deleted file mode 100644
index 34dc502..0000000
--- a/code/piplayer2.py
+++ /dev/null
@@ -1,26 +0,0 @@
-import RPi.GPIO as GPIO
-import time
-
-# photo sensor on PIN 4
-GPIO.setmode(GPIO.BCM)
-GPIO.setup(4, GPIO.IN)
-
-# LED on PIN 17
-GPIO.setup(17, GPIO.OUT)
-GPIO.output(17, GPIO.LOW)
-
-try:
-    print('Start sensor test')
-    
-    while True:
-        time.sleep(0.25)
-        if (GPIO.input(4) == GPIO.LOW):
-            print('LOW')
-            GPIO.output(17, GPIO.LOW)
-        else:
-            print('HIGH')
-            GPIO.output(17, GPIO.HIGH)
-
-except KeyboardInterrupt:
-    print('bye')
-    GPIO.cleanup()
diff --git a/code/test/ir_sender.py b/code/test/ir_sender.py
index bb55b0f..0bff253 100644
--- a/code/test/ir_sender.py
+++ b/code/test/ir_sender.py
@@ -3,10 +3,10 @@ import time
 
 GPIO.setwarnings(False)
 GPIO.setmode(GPIO.BCM)
-GPIO.setup(24, GPIO.OUT)
+GPIO.setup(22, GPIO.OUT)
 
 while True:
-    GPIO.output(24, True)
+    GPIO.output(22, True)
     time.sleep(1)
-    GPIO.output(24, False)
+    GPIO.output(22, False)
     time.sleep(1)
diff --git a/code/test/lightoff.py b/code/test/lightoff.py
index 6129c89..611d5c4 100644
--- a/code/test/lightoff.py
+++ b/code/test/lightoff.py
@@ -1,9 +1,8 @@
 import RPi.GPIO as GPIO
-import time
 
-GPIO.setmode(GPIO.BOARD)
+GPIO.setmode(GPIO.BCM)
 
-GPIO.setup(11,GPIO.OUT)
-GPIO.output(11,GPIO.LOW)
+GPIO.setup(27,GPIO.OUT)
+GPIO.output(27,GPIO.LOW)
 
 GPIO.cleanup()
diff --git a/code/test/lighton.py b/code/test/lighton.py
index 9a33402..340325c 100644
--- a/code/test/lighton.py
+++ b/code/test/lighton.py
@@ -1,8 +1,7 @@
 import RPi.GPIO as GPIO
-import time
 
-GPIO.setmode(GPIO.BOARD)
+GPIO.setmode(GPIO.BCM)
 
-GPIO.setup(11,GPIO.OUT)
-GPIO.output(11,GPIO.HIGH)
+GPIO.setup(27,GPIO.OUT)
+GPIO.output(27,GPIO.HIGH)
 
diff --git a/code/test/sensor.py b/code/test/sensor.py
index 8958495..a3475ef 100644
--- a/code/test/sensor.py
+++ b/code/test/sensor.py
@@ -1,25 +1,25 @@
 import RPi.GPIO as GPIO
 import time
 
-# photo sensor on PIN 4
+# photo sensor on PIN 17
 GPIO.setmode(GPIO.BCM)
-GPIO.setup(4, GPIO.IN)
+GPIO.setup(17, GPIO.IN)
 
-# LED on PIN 17
-GPIO.setup(17, GPIO.OUT)
-GPIO.output(17, GPIO.LOW)
+# LED on PIN 27
+GPIO.setup(27, GPIO.OUT)
+GPIO.output(27, GPIO.LOW)
 
 try:
     print('Start sensor test')
     
     while True:
         time.sleep(0.25)
-        if (GPIO.input(4) == GPIO.LOW):
+        if (GPIO.input(17) == GPIO.LOW):
             print('LOW')
-            GPIO.output(17, GPIO.LOW)
+            GPIO.output(27, GPIO.LOW)
         else:
             print('HIGH')
-            GPIO.output(17, GPIO.HIGH)
+            GPIO.output(27, GPIO.HIGH)
 
 except KeyboardInterrupt:
     print('bye')
diff --git a/misc/748-cny70-czujnik-optyczny-odbiciowy.html.pdf b/misc/748-cny70-czujnik-optyczny-odbiciowy.html.pdf
new file mode 100644
index 0000000..3e2ffd9
Binary files /dev/null and b/misc/748-cny70-czujnik-optyczny-odbiciowy.html.pdf differ
diff --git a/misc/electronics-final.fzz b/misc/electronics-final.fzz
new file mode 100644
index 0000000..d4a15a8
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diff --git a/misc/www.youtube.com_KLkNqmqXVtA.png b/misc/www.youtube.com_KLkNqmqXVtA.png
new file mode 100644
index 0000000..8a8484f
Binary files /dev/null and b/misc/www.youtube.com_KLkNqmqXVtA.png differ