DESIGN AND IMPLEMENTATION OF A PERSISTENCE Of VISION DISPLAY SYSTEM USING LIGHT EMITTING DIODE (LED)

Abstract

This study is aimed at designing and implementing a light emitting diode (LED) rotating information display system which can display any character sent to it via Bluetooth devices. The system is used for displaying information in a rotating manner. The light emitting diodes are arranged vertically on the mother board and it is controlled with the use of a microcontroller, which is programmed with a C-programming language and a G5 programmer will be used to compile it into a low-level language which the system understands. To enable a character to be sent to the display system, a user interface (Bluetooth module) will be used. In order to achieve persistence of vision (POV), a very high speed is required and, in this study, a brushless D.C. generator (which can achieve speeds of 1500 RPM and more) was used to achieve this speed. The system, upon completion, was discovered to operate satisfactorily. It rotated at a speed of 3600 RPM and displayed characters sent to it via the Bluetooth module using an android phone.