CONSTRUCTION

The purpose of this research is to have an affordable and clean energy supply in our household. Inadequate power supply in Nigeria has been a major challenge bedeviling our institutions. Some areas connected to the distribution companies (DISCOs) have what is referred to as a regimented load shedding where power supply may range from 6.00 to 12.00 hrs within 24 hrs. Homes and offices have resolved to sourcing for alternative power supply such as generator plants, solar PVs, inverters, etc. Thus, the 2.5KVA inverter system was proposed to serve as a backup once there is power outage from the DISCOs. An inverter system enables the conversion of direct current (DC) from batteries to alternating current (AC) needed to run the office appliances at a minimal cost and optimal efficiency. The project focuses on the design and construction of a pure sine wave 2.5KVA 50Hz inverter system to deliver 220V AC using 2 Nos 12V DC batteries (rated 200A) connected in series.

This project focuses on the design, construction, and experimental analysis of three distinct meter bridges fabricated using aluminum, steel, and copper base plates. The primary objective was to measure and compare the internal resistance of a constantan wire using these three different conductive materials, and to analyze how the type of base metal affects the accuracy, sensitivity, and stability of resistance measurements. The study is based on the fundamental principle of the Wheatstone Bridge, which provides a reliable method for comparing and determining unknown resistances by achieving a state of balance between two arms of an electrical network. The meter bridge, being a modified form of the Wheatstone bridge, was selected due to its simplicity, accuracy, and wide applicability in electrical measurement laboratories. During fabrication, each meter bridge consisted of a one-meter uniform wire mounted on a polished metal base (aluminum, steel, or copper), fitted with thick brass strips, standard resistors, binding posts, and a jockey for variable contact. A Leclanché cell served as the power source, and a center-zero galvanometer was employed to detect the balance point. Constantan was chosen as the test wire due to its negligible temperature coefficient of resistance and high mechanical stability. Experimental readings were taken for various known resistances, and the corresponding balance lengths were recorded. The internal resistance of the constantan wire was computed and analyzed.

In order to fuse two metal components, electric arc welding uses electrical heat to cause melting, which, when cooled, forms a solid connection. In order to protect the molten metal from exposure to the atmosphere and stop chemical reactions, slag is injected throughout this operation. A power source that creates an electric arc between the metal material and the electrode to be fused is necessary for this process. Both consumable and non-consumable electrodes, as well as alternating or direct current, are used by welders. An electrode is a conductor that creates the heat required for melting and fusing by sending electric current to the metal to be welded. Whether an electrode is consumable or non- consumable depends on the specific arc welding process being used. The electrical energy needed for the arc welding process may be obtained from a variety of power source methods. Constant voltage and constant current power sources are the most common varieties.

The increasing demand for sustainable food production and environmental conservation has necessitated the development of eco-friendly agricultural structures. This study focuses on the design and construction of an eco-friendly minimizing ecological impact. The project integrates locally available and biodegradable materials such as bamboo, palm fronds, and recycled mesh to
create a cost-effective and environmentally sustainable housing system. The screen house was designed to provide an ideal microclimate—maintaining adequate humidity, temperature, and ventilation—to enhance the growth, breeding, and survival rates of Achatina species. Solar-powered lighting and a rainwater harvesting system were incorporated to reduce energy consumption and promote resource efficiency. Performance evaluation of the structure showed improved snail growth rate, reduced mortality, and minimal pest invasion compared to conventional open systems. The results demonstrate that eco-friendly screen houses offer a production. practical, low-cost, and sustainable solution for small- and medium-scale snail farmers, aligning with global efforts toward green agricultural innovations and climate-smart animal

This study investigated the various applications of glass in construction to educate readers on the social, economic, and environmental advantages of using glass in Nigeria's construction sector. The study examined how glass has been used in most of Nigeria’s building design and construction sector. Although glass has played a significant role in the construction industry and has to a large extent improved the quality of buildings, there is still a great deal of unrealized potential that can be used in construction for novel purposes. Therefore, to broaden people's perspectives and educate them about the significance of glass in daily life, the research compared the usage of glass in the local area to a building internationally acclaimed in the aspects of function, aesthetics and the sometimes- overlooked structural capabilities of glass.

In Nigeria, a borehole is one of the best means of obtaining clean water in field condition. However, field operations in remote areas or in difficult conditions often require flexibility and imagination in avoiding and solving technical problems. The automated borehole regulator serves as a means to control the pumping of water between predefined upper and lower limits. This system mainly works on a principle that “water conducts electricity”. 5 wires are dipped into the tank with a certain gap between each wire will indicate the different water levels. Based on the outputs of these wires, microcontroller displays water level using LEDs as well as controls the flow of water by controlling the motor of the pump. In the 1st phase, the program is burnt into the microcontroller, and the 5 copper wires are used to indicate water level, and a motor controls the flow of water. An increase in the water level is determined by the wires, and the signal is sent to the microprocessor and afterwards displayed on the LCD screen. The overall system testing of integrated design of voltage measurement device. The testing and integration are done to ensure that the design is functioning properly as expected thereby enabling the intended user(s) for which the project was targeted for, appreciate its implementation and equally approaches used in the design and integration of various modules of the project.