diff --git a/basic_concepts/index.html b/basic_concepts/index.html
index ffcee522b7b10c679f5c6201892c1309e75de222..b7f715b8da45362096bb686a10b6b530cc0b0007 100644
--- a/basic_concepts/index.html
+++ b/basic_concepts/index.html
@@ -33,6 +33,8 @@ A good starting point for newcomers in the electronics field looking for what is
 
   ### Voltage
 
+  - [Notes on voltages in circuits](https://roberthart56.github.io/SCFAB/SC_lab/Electronics/electronic_basics.html)
+
   - to get electric current flow between two points you need a voltage across them
   - a voltage causes an Electromotive Force (EMF)
   - Technical Note: "voltage" known as "potential difference" or just "potential"