Yousof Ahmad

Simple Digital Counter Using Arduino UNO and 7-Segment Display

As part of our university coursework, we developed a simple digital counter using an Arduino UNO and a 2-digit 7-segment display. The system is designed to count numbers interactively through two push buttons and display the result in real-time. Main Features: Increment Button: A short press increases the counter by 1. Decrement Button: A short press decreases the counter by 1. Long Press: Holding down the increment or decrement button causes the counter to change rapidly in the corresponding direction. Reset Function: Pressing both buttons simultaneously resets the counter to zero. Technical Overview: The circuit was built on a breadboard to allow flexibility and ease of testing. The Arduino was programmed using the Arduino IDE in C/C++, with functions modularized for clarity and reusability. Button debouncing was implemented in software to ensure reliable input detection. The 2-digit 7-segment display was interfaced directly with the microcontroller, with proper current-limiting resistors. Educational Value: This project demonstrates how basic electronic components and simple logic can be used to create a fully functional digital system. It introduces key concepts such as: Handling digital inputs from push buttons. Managing display output on a 7-segment module. Implementing long press detection and multi-button logic. Writing structured embedded C/C++ code for microcontroller applications. The result is a clean, responsive, and user-friendly digital counter—ideal for learning and demonstrating core embedded system principles.