diff --git a/tools/simulators/test_sim.cpp b/tools/simulators/test_sim.cpp
index 8986135..ea159f9 100644
--- a/tools/simulators/test_sim.cpp
+++ b/tools/simulators/test_sim.cpp
@@ -7,13 +7,15 @@ m_button("button", "Off", Color(Color::White), Color(Color::Red), [this](std::st
 m_combobox("combobox", "Combobox", Color(Color::White), Color(Color::Black), {"Option 1", "Option 2", "Option 3"}, 0, [](std::string id, std::string selected) { spdlog::info("Combobox {} selected {}", id, selected); }),
 m_label("label", "Label", Color(Color::White), Color(Color::Black)),
 m_checkbox("checkbox", "Checkbox", Color(Color::White), Color(Color::Black), {"Option 1", "Option 2", "Option 3"}, [](std::string id, std::vector<std::string> selected) { spdlog::info("Checkbox {} selected {}", id, (selected.size() > 0 ? selected[0] : "")); }),
-m_slider("slider", "Slider", Color(Color::White), Color(Color::Black), 0, 100, 50, [](std::string id, double value) { spdlog::info("Slider {} changed to {}", id, value); })
+m_slider("slider", "Slider", Color(Color::White), Color(Color::Black), 0, 100, 50, [](std::string id, double value) { spdlog::info("Slider {} changed to {}", id, value); }),
+m_led("led", "Led", Color(Color::White), Color(Color::Black), Color(Color::Red))
 {
     this->add_UI_item(&this->m_button);
     this->add_UI_item(&this->m_combobox);
     this->add_UI_item(&this->m_label);
     this->add_UI_item(&this->m_checkbox);
     this->add_UI_item(&this->m_slider);
+    this->add_UI_item(&this->m_led);
 }
 
 void Test_Sim::timer()
@@ -34,6 +36,8 @@ void Test_Sim::button_clicked(std::string id)
         bool state = this->m_button.bg_color() == Color(Color::Red) ? true : false;
         this->m_button.set_bg_color(state ? Color(Color::Green) : Color(Color::Red));
         this->m_button.set_text(state ? "On" : "Off");
+        
+        this->m_led.set_led_color(state ? Color(Color::Green) : Color(Color::Red));
         return;
     }
 }
diff --git a/tools/simulators/test_sim.hpp b/tools/simulators/test_sim.hpp
index b6703f8..851d1ad 100644
--- a/tools/simulators/test_sim.hpp
+++ b/tools/simulators/test_sim.hpp
@@ -14,4 +14,5 @@ class Test_Sim : public Simulator_base {
         UI_label m_label;
         UI_checkbox m_checkbox;
         UI_slider m_slider;
+        UI_led m_led;
 };