Design and Implementation of a GSM Based Scrolling Message Display Board

Adamu Murtala Zungeru, Gbenga Daniel Obikoya, Ochi Fortunatus Uche

Research output: Contribution to journalArticlepeer-review


This research work is developed with two AT89C52 microcontrollers from Atmel. The microcontrollers
provide all the functionality of the display notices and wireless control. The Display is obtained on a 7X96 Light Emitting Diode (LED) dot matrix display, arranged on a Vero board. A desired text message from a mobile phone is sent via a Global System for Mobile Communication (GSM) to the GSM module located at the receiving end. The GSM modem is connected, through MAX 232 Integrated Circuit (MAX 32 IC), to the AT89C52 microcontroller. The message that is stored in the Electrically Erasable Programmable Read Only Memory (EEPROM) is then displayed on the LED dot matrix display. This hardware uses regulated 5V, 500mA power supply. A three-terminal LM7805 is employed for regulation of the voltage. A bridge
type full-wave rectifier is used to rectify the AC output of the secondary of 230/12V step down transformer. The system was tested to work according to specification.
Original languageEnglish
Pages (from-to)21-31
Number of pages11
JournalInternational Journal of Computational Science, Information Technology and Control Engineering (IJCSITCE)
Issue number3
Publication statusPublished - 2014


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