These Digital Tutors are interactive and started with very basic JavaScript and CSS. You can operate the controls and see the Truth Table and Results in LED Displays. Controls include DIP Switches and Push Buttons.

Tutorials on Digital Electronics

• The NOT gate - Digital Logic gates
  
• The AND gate - Digital Logic gates
  
• The OR gate - Digital Logic gates
  
• The XOR gate - Digital Logic gates
  
• Digital Up Down Preset Counter CD4029
  
• Astable Mutivibrator with 555 Timer
  
• Running Lights with 555 and CD4017
  

In Electronics Theory Section


Here is a Snapshot of a Live iGoogle Page showing a Digital Preset counter Gadget in Canvas view.
Other Gadgets are Logic Gates Tutor and Digital Timer