fixing spelling errors

basic_concepts/index.html

@@ -8,6 +8,8 @@
 
 ##Basic concepts  
 
+A good starting point for newcomers in the electronics field looking for what is they must to learn is the flowchart depicted in the image below:  
+
 ![general](imgs-filippos/1.JPG)
 
   ### Current 

index.html

@@ -17,6 +17,14 @@ ___
 ###Outline.
 
 - [Basic Concepts.](basic_concepts/index.html)
+	- Current, Voltage, Resistance
+	- Wire Gauges
+	- Circuits  & Circuit Analysis
+	- Resistors
+	- Switches
+	- Diodes
+	- Capacitors
+	- Transistors
 
 - [Inductors and motor driving.](inductors_motors/index.html)