Updated README.md

Author: malikalhack

README.md

@@ -11,4 +11,7 @@ as an indication of the current brightness level
 for each of the control channels. The device is controlled using four buttons.  
 
 The connection diagram of this controller is shown in the figure below.
+
 ![The connection diagram](/Images/Schematic.JPG "Schematic")
+
+**Note.** *When using a load greater than 20 mA, installing the corresponding transistor switches on the controller output is necessary.*