_sidebar.md

@@ -4,7 +4,7 @@
   
 [<img align="left" width="33%" src="uploads/fa9f1501bb60a110766c995e189e118a/fpbaselogo3.png">](https://www.fpbase.org)
 
-  
+  ![logo4](uploads/40ce2af43a1dc0fb4516b4dda2a7a5f2/logo4.png){width=20%}
   
 ### [Home](home) 
 
@@ -274,5 +274,8 @@
 
 ##### Tools
 
+[<img align="left" width="42%" src="uploads/40ce2af43a1dc0fb4516b4dda2a7a5f2/logo4.png">](Home)
 
-![logo4](uploads/40ce2af43a1dc0fb4516b4dda2a7a5f2/logo4.png){width=20%}
+[<img align="left" width="28%" src="uploads/b89acba94463cf4c7fe9aea82bdb7fd1/svilogo3.png">](https://svi.nl/Nyquist-Calculator)   
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+  
+[<img align="left" width="28%" src="uploads/fa9f1501bb60a110766c995e189e118a/fpbaselogo3.png">](https://www.fpbase.org)
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