diff --git a/basic_concepts/index.html b/basic_concepts/index.html
index 766275ddfb83f9037c9d8966143754645a5dab78..8b61d20409f6fd461e8eca9d251d35748b0debe0 100644
--- a/basic_concepts/index.html
+++ b/basic_concepts/index.html
@@ -12,6 +12,8 @@ A good starting point for newcomers in the electronics field looking for what is
 
 ![general](imgs-filippos/1.JPG)
 
+[Symbols and devices](https://roberthart56.github.io/SCFAB/SC_lab/Electronics/electronics_basics/electronic_basics.html)
+
   ### Current
 
   - total charge that passes through some cross-sectional area A per unit time
@@ -33,7 +35,7 @@ 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)
+  - [Notes on voltages in circuits](https://roberthart56.github.io/SCFAB/SC_lab/Electronics/electronics_basics/electronic_basics.html)
 
   - to get electric current flow between two points you need a voltage across them
   - a voltage causes an Electromotive Force (EMF)