• A regulated power supply for walkman ( circuit diagram , appeared as `Circuit Idea' in EFY, March 1996).
• Digital clock with seconds and alarm time display ( circuit diagram , appeared as `Construction Project' in EFY, June 2003).
• A simple telephone receiver ( circuit diagram , appeared as `Circuit Idea' in EFY, September 2003).
• Auto-snooze for digital clock( circuit diagram , appeared as `Circuit Idea' in EFY, October 2003).
• Dial clock ( circuit diagram , the drawing of the circuit is frightening, have to make a clean schematic before submitting).