diff --git a/src/main/java/fabrik/simulator/pic16f84/Controller_Frontend.java b/src/main/java/fabrik/simulator/pic16f84/Controller_Frontend.java
index 238ba1d..24dc854 100644
--- a/src/main/java/fabrik/simulator/pic16f84/Controller_Frontend.java
+++ b/src/main/java/fabrik/simulator/pic16f84/Controller_Frontend.java
@@ -566,6 +566,7 @@ public class Controller_Frontend extends PICComponent implements FrontendControl
     @Override
     public void initialize(PICComponentLocator locator) {
         super.initialize(locator);
+        executionTime.registerObserver(this);
         this.picComponents = locator;
         System.out.println("Frontend");
     }
diff --git a/src/main/java/fabrik/simulator/pic16f84/EEPROM.java b/src/main/java/fabrik/simulator/pic16f84/EEPROM.java
index 5a341e1..06ea13c 100644
--- a/src/main/java/fabrik/simulator/pic16f84/EEPROM.java
+++ b/src/main/java/fabrik/simulator/pic16f84/EEPROM.java
@@ -174,6 +174,7 @@ public class EEPROM extends PICComponent implements EEPROMInterface, ExecutionTi
     @Override
     public void initialize(PICComponentLocator locator) {
         super.initialize(locator);
+        executionTime.registerObserver(this);
     }
 
     @Override
diff --git a/src/main/java/fabrik/simulator/pic16f84/ExecutionTimeSubject.java b/src/main/java/fabrik/simulator/pic16f84/ExecutionTimeSubject.java
index 6b2dff2..f5fe308 100644
--- a/src/main/java/fabrik/simulator/pic16f84/ExecutionTimeSubject.java
+++ b/src/main/java/fabrik/simulator/pic16f84/ExecutionTimeSubject.java
@@ -24,29 +24,8 @@ public abstract class ExecutionTimeSubject extends PICComponent implements PICCo
     }
 
     protected void notifyObservers(){
-        for (final ExecutionTimeObserver each : observers){
-            notify(each);
-                    }
-                }
-             
-    protected void notify(final ExecutionTimeObserver observer) {
-        createNotifierFor(observer).start();
-    }
-            
-            
-    protected Thread createNotifierFor(ExecutionTimeObserver observer) {
-        return new Thread(){
-            public void run(){
-                try {
-                    observer.executionTimeChanged();
-                } catch (Exception e){
-                    e.printStackTrace();
-                    ExecutionTimeSubject.this.observers.remove(observer);
-                }
-            }
-        };
-    }
-        
+            observers.forEach(o -> o.executionTimeChanged());
+        }
         
     public double getTotalExecutionTime(){
         throw new UnsupportedOperationException("No class implements ExecutionTimeSubject correctly!");
diff --git a/src/main/java/fabrik/simulator/pic16f84/Timer.java b/src/main/java/fabrik/simulator/pic16f84/Timer.java
index 2061309..a6e7773 100644
--- a/src/main/java/fabrik/simulator/pic16f84/Timer.java
+++ b/src/main/java/fabrik/simulator/pic16f84/Timer.java
@@ -67,6 +67,7 @@ public class Timer extends PICComponent implements TimerInterface, ExecutionTime
     @Override
     public void initialize(PICComponentLocator locator) {
         super.initialize(locator);
+        executionTime.registerObserver(this);
     }
 
     @Override