Abstract

• An electronic device is created and constructed. It is intended to become a kind of teaching aid for electronic lecturers and students. The circuit was designed to help calculating various outputs of the 555 timer ICs in Astable mode and Monostable mode. Calculations can be easily made for frequency, period, duty cycle, and delay time outputs. Moreover, schematic displays and input values of the components can be display with graphical colorful images. The circuit design consists of Arduino Mega development board, a few input switches, a 3.5in TFT color LCD display, a piezo buzzer, and two 3.7V li-ion batteries. The whole circuit is operated by a program code created by using Arduino IDE software. The complete circuit was constructed on a specially created printed circuit board.