diff --git a/plugins/circuits/ElectronicCircuit.h b/plugins/circuits/ElectronicCircuit.h
index d49ab3d..01d4662 100644
--- a/plugins/circuits/ElectronicCircuit.h
+++ b/plugins/circuits/ElectronicCircuit.h
@@ -3,19 +3,58 @@
 #include <memory>
 #include <vector>
 
-class Terminal
+class CircuitElement
 {
 
 };
 
+class Terminal : public CircuitElement
+{
+public:
+    enum class Type
+    {
+        INPUT,
+        OUTPUT
+    };
+
+    Terminal(Type type)
+        : mType(type)
+    {
+
+    }
+
+private:
+    double mValue{0};
+    Type mType;
+};
+
 class Wire
 {
+public:
+    Wire(CircuitElement* input, CircuitElement* output)
+        : mInput(input),
+          mOutput(output)
+    {
 
+    }
+
+private:
+    CircuitElement* mInput{nullptr};
+    CircuitElement* mOutput{nullptr};
 };
 
 class LogicGate
 {
+public:
+    enum class Type
+    {
+        NOT,
+        AND,
+        OR,
+        XOR,
 
+
+    };
 };
 
 class ElectronicCircuit