Update README.md

Author: Zhentao-Lin

README.md

@@ -4,6 +4,27 @@
 
 <img src='Picture/icon.png' width='30%'/>
 
+### Connection Board Version
+
+<table>
+  <tr>
+    <th>PCB Version</th>
+    <th>PCB Picture</th>
+  </tr>
+  <tr>
+    <td>V1.0</td>
+    <td align="center">
+      <img src='Picture/PCB_V1.0.png' width='30%' alt='V1.0'/>
+    </td>
+  </tr>
+  <tr>
+    <td>V2.0</td>
+    <td align="center">
+      <img src='Picture/PCB_V2.0.png' width='30%' alt='V2.0'/>
+    </td>
+  </tr>
+</table>
+
 ### Download
 
 * **Use command in console**