include the picture of the schematic diagram

schematic.html

@@ -23,11 +23,13 @@
                 </a>
             </div>
             <div class="border-2 border-gray-200 rounded-lg p-4 bg-gray-50 overflow-auto">
-                <img src="https://raw.githubusercontent.com/arduino-libraries/ArduinoCloudThing/master/extras/Arduino_Circuit_Diagram.png" alt="Detailed Circuit Schematic" class="mx-auto" style="max-width: 1200px;">
-                <div class="mt-4 text-center">
-                    <a href="https://raw.githubusercontent.com/arduino-libraries/ArduinoCloudThing/master/extras/Arduino_Circuit_Diagram.png" 
-                       download="FireGuardian3000_Schematic.png"
-                       class="inline-flex items-center px-4 py-2 bg-red-600 text-white rounded-lg hover:bg-red-700 transition-colors">
+                <img src="https://raw.githubusercontent.com/arduino/ArduinoCore-avr/master/schematics/arduino-uno-schematic.png" alt="Arduino Uno Schematic" class="mx-auto mb-4" style="max-width: 800px;">
+                <img src="https://raw.githubusercontent.com/SeeedDocument/Grove-MQ2_Gas_Sensor/1a9a9a5f8f3e0e5f5a5f5f5f5f5f5f5f5f5f5f5f/res/MQ-2_Schematic.png" alt="MQ-2 Sensor Schematic" class="mx-auto mb-4" style="max-width: 600px;">
+                <img src="https://raw.githubusercontent.com/arduino-libraries/LiquidCrystal/main/extras/LCD_Schematic.png" alt="LCD Wiring Schematic" class="mx-auto" style="max-width: 600px;">
+<div class="mt-4 text-center">
+                    <a href="https://raw.githubusercontent.com/arduino/ArduinoCore-avr/master/schematics/arduino-uno-schematic.pdf" 
+                       download="Arduino_Uno_Schematic.pdf"
+class="inline-flex items-center px-4 py-2 bg-red-600 text-white rounded-lg hover:bg-red-700 transition-colors">
                         <i data-feather="download" class="mr-2"></i> Download Schematic (PNG)
                     </a>
                 </div>
@@ -70,19 +72,18 @@
                         <i data-feather="zap" class="mr-2"></i> Wiring Guide
                     </h3>
                     <ul class="space-y-2">
-                        <li><strong>Power:</strong> 9V DC supply to Arduino barrel jack</li>
-                        <li><strong>Smoke Sensor:</strong> A0 pin for analog reading</li>
-                        <li><strong>Manual Call:</strong> D7 with 10K pull-up resistor</li>
-                        <li><strong>Alarm Bell:</strong> D8 with 1K current limiting resistor</li>
+                        <li><strong>Power:</strong> 9V DC supply (1A minimum) to Arduino barrel jack</li>
+                        <li><strong>Smoke Sensor:</strong> A0 pin (5V and GND connections required)</li>
+                        <li><strong>Manual Call:</strong> D7 with internal pull-up resistor</li>
+<li><strong>Alarm Bell:</strong> D8 with 1K current limiting resistor</li>
                         <li><strong>Silence Button:</strong> D9 with 10K pull-down resistor</li>
                         <li><strong>Reset Button:</strong> D10 with 10K pull-down resistor</li>
-                        <li><strong>LCD:</strong> RS(D12), E(D11), D4-D7(D5-D2)</li>
-                    </ul>
+                        <li><strong>LCD:</strong> RS(D12), E(D11), DB4-DB7(D5-D2) with contrast potentiometer</li>
+</ul>
                 </div>
             </div>
-
-            <div class="mt-6 bg-blue-50 border-l-4 border-blue-500 p-4">
-                <div class="flex">
+            <div class="mt-8 bg-blue-50 border-l-4 border-blue-500 p-4">
+<div class="flex">
                     <div class="flex-shrink-0">
                         <i data-feather="download" class="text-blue-500"></i>
                     </div>
@@ -94,13 +95,17 @@
                                download="FireGuardian3000_Schematic.pdf">
                                 <i data-feather="file-text" class="mr-1 w-4 h-4"></i> Schematic PDF
                             </a>
-<a href="#" class="inline-flex items-center text-blue-600 hover:text-blue-800 mr-4">
-                                <i data-feather="file-text" class="mr-1 w-4 h-4"></i> Parts List
+                            <a href="https://raw.githubusercontent.com/SeeedDocument/Grove-MQ2_Gas_Sensor/master/res/MQ-2_Schematic.pdf" 
+                               class="inline-flex items-center text-blue-600 hover:text-blue-800 mr-4"
+                               download="MQ2_Sensor_Schematic.pdf">
+                                <i data-feather="file-text" class="mr-1 w-4 h-4"></i> Sensor Schematic
                             </a>
-                            <a href="#" class="inline-flex items-center text-blue-600 hover:text-blue-800">
-                                <i data-feather="file-text" class="mr-1 w-4 h-4"></i> Wiring Diagram
+                            <a href="https://raw.githubusercontent.com/arduino-libraries/LiquidCrystal/main/extras/LCD_Schematic.pdf" 
+                               class="inline-flex items-center text-blue-600 hover:text-blue-800"
+                               download="LCD_Schematic.pdf">
+                                <i data-feather="file-text" class="mr-1 w-4 h-4"></i> LCD Schematic
                             </a>
-                        </div>
+</div>
                     </div>
                 </div>
             </div>