_sidebar.md

@@ -271,3 +271,9 @@
 
 ##### Tools
 
+[<img align="left" width="20%" src="uploads/b89acba94463cf4c7fe9aea82bdb7fd1/svilogo3.png">](https://svi.nl/Nyquist-Calculator)   
+  
+[<img align="left" width="20%" src="uploads/fa9f1501bb60a110766c995e189e118a/fpbaselogo3.png">](https://www.fpbase.org)
+
+[<img align="left" width="20%" src="uploads/8cd2e4fc50a19821370fda2580a5c1c5/boptlogo3.png">](Home)
+