Browsing by Author "Godwin Babatunde Egbeyale"

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    Design and Construction of a Microcontroller Based Electronic Moving Message Display
    (.scirp.org/journal/ojapps, 2022) Titus Taofk Ogunseye; Godwin Babatunde Egbeyale; , Adekunle K. Bello; Adegbenro S. Ajani
    LED-based moving-message displays are becoming appreciated among the general public for transmitting information to groups of people quickly. This work presents a simple design and implementation of a microcontrol ler-based electronic moving message display system. The design involves the arrangement of Light Emitting Diodes (LEDs) and the programming of a mi crocontroller that controls and determines the pattern and session of the dis play. The implementation of a moving message displays a text containing 22 characters (i.e. WELCOME TO DEPT. OF PHYSICS). The electronic mes sage display helps to pass information, educates, enlightens, facilitates com mercial activities through the advertisement and marketing of goods and ser vices, description of places, etc. The ease in which it displays information makes it a veritable, suitable, and excellent tool for passing information fast and pleasurable to the public. Furthermore, it enhances the response to in formation in an attractive way and manner in which it displays messages. The microcontroller used in this work is the PIC16F84A. It belongs to a class of 8-bit microcontrollers of RISC (reduced instructions set) architecture. Its output controls the switching of the relays through a transistor switching stage that switches its socket. The LED matrix (array) is arranged in parallel and soldered to a Vero board with the microcontroller and other electronic components, such as resistors, capacitors, transistors, relays, LEDs, diodes, and transformers. In view, this work served as a means of digging into the technology involved in the use of a microcontroller and some other basic electronic components and enhanced visualization of message display.
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    Geotechnical Properties of Surfactant Modified Lateritic Soils
    (Springer Nature, 2025-11-25) Olubunmi Oluwadare Owoyemi; Lekan Olatayo Afolagboye; Godwin Babatunde Egbeyale
    Surfactants may exist in soils as contaminants or as additives for soil remediation and stabilization. The effect of different types of surfactants containing soaps on important geotechnical properties of lateritic soil samples from Oro and Ajase Southwestern Nigeria was investigated here. The soils in their natural state were characterized using specified standard geotechnical methods, X-ray Diffractometry (XRD) and X-ray fluorescence respectively (XRF). The soil samples were modified with liquid soap, bar soap and detergent and the effect of this contamination on important geotechnical properties such as Atterberg limits, bulk density, specific gravity, compaction, permeability, California bearing ratio (CBR), matric suction and shear strength parameters of the soils were investigated. Soils from both locations contain kaolinite, quartz and goethite in varying percentages, while silica, aluminium and iron oxide are the dominant oxides. The addition of surfactants in the three soap types resulted in an increased plasticity index of up to 93%, cohesion and optimum moisture content in soils from the locations. Bulk density, maximum dry density, angle of internal friction and permeability are reduced in them. Matric suction increased in all the soils with the greater increase recorded in the ones modified with liquid soap. These changes are attributable to the dispersion of clay minerals in the soils. Oro soil with a higher percentage of kaolinite is more sensitive to surfactants. The effect of surfactant-containing soaps on the geotechnical properties of lateritic soils vary based on mineralogy and surfactants type.