Control method of LED matrix bulletin board that can be connected to Bluetooth mobile phone

Noor Amer Hamzah (Alnukhba University College, Baghdad, Iraq)
Muneer S.G. Mansoor (College of Engineering, University of Information Technology and Communications (UOITC), Iraq)
Zinah S. Jabbar (Department of Communication Technology Engineering, Imam Ja'afar Al-Sadiq University, Baghdad, Iraq. [e-mail])
Yitong Niu (School of Aeronautical Engineering, AnYang University, Anyang, China)
Jamal Fadhil Tawfeq (Department of Medical Instrumentation Technical Engineering, Medical Technical College, Al-Farahidi University, Baghdad, Iraq)
Ahmed Dheyaa Radhi (College of Pharmacy, University of Al-Ameed, Karbala PO Box 198, Iraq)

Jurnal Pengabdian dan Pemberdayaan Masyarakat Indonesia
Vol. 3 No. 7 (2023)

Traditional bulletin boards use paper as a way of presentation, and with the promotion of sustainability, it is clear that paper that can only be used once is very wasteful. The use of LEDs to replace traditional bulletin boards is not only more efficient and functional but also beneficial to the environment. This paper focuses on an operating system for LED bulletin boards that interacts with an Android application via Bluetooth, where the user can send the content to be displayed to a matrix that then displays and moves the message. The central processing unit used in the system is an Atmega328 microcontroller dedicated to the Arduino UNO board, shifts for measuring, walking, and scrolling the screen to move the text from right to left, and a Bluetooth module for enabling wireless network functionality and receiving features. It is hoped that the system will benefit LED bulletin boards.