diff --git a/eu.heili/DigitalInput.java b/eu.heili/DigitalInput.java
index c428309..6cd52c2 100644
--- a/eu.heili/DigitalInput.java
+++ b/eu.heili/DigitalInput.java
@@ -1,5 +1,6 @@
 public class DigitalInput {
     private boolean value = false;
+    private LogicGate gt = null;
 
     public DigitalInput(final boolean value) {
         setValue(value);
@@ -24,7 +25,11 @@ public class DigitalInput {
     }
 
     public boolean getValue() {
-        return value;
+        if (gt != null) {
+            return gt.getOutput(); // validate gate here
+        } else {
+            return value;
+        }
     }
 
     public void setValue(boolean value) {
@@ -32,7 +37,7 @@ public class DigitalInput {
     }
 
     public void setValue(LogicGate gate) {
-        this.value = gate.getOutput(); // todo validation stuff
+        this.gt = gate;
     }
 
     public void setValue(int value) {