International Journal of Emerging Scientific Research

Design and Implementation of an Automatic Changeover and Phase Selector System

2025-06-15T14:52:05+00:00

Alternative sources of power like generators and solar panels are inevitable due to the erratic nature of the power supply in Nigeria, which is caused by increased consumer demand and poor infrastructure maintenance, An automatic switching system is necessary to prevent a disruption in the power supply. This study presents an automatic changeover and phase selection system that is coupled to the power supply. In order to properly isolate, switch, and show switching states through the integration of hardware, the design utilizes contactors and timer relays. The automatic phase selector and changeover switch is contactor based; it incorporates contactors, relays and timers to transfer the load to alternative supply when the primary source (public utility) supply fails and also monitoring the public utility when power is restored transferring back the load to the public utility. The switch is tested to operate efficiently within a range ±5% of the nominal voltage of 220V, the switch requires approximately 4 seconds to transition between power supplies. This developed device will significantly enhance power transition time, particularly for low to middle-income families who may find industrial automatic transfer switches expensive due to their high costs

Design and Development of an Infrared-Based Home Security System

2025-06-15T14:52:05+00:00

The development of intruder detection, employing a passive infrared (PIR) sensor detecting intruders in a secured site, incorporating GSM technology for real-time security notification is presented in this study. This smart home security system was designed to enhance security in residential homes and areas considered. The principal devices used are PIR sensors for motion detection, a microcontroller for operation control, and a SIM900 as a GSM module for data transfer. Motion detection is based on the principle of infrared radiation produced by the heat generated by the human body which triggers the PIR sensor. The microcontroller processes the signal received from human motion and then buzzes the alarm. The microcontroller activates the GSM module and sends an SMS message to the user’s mobile device. This enables the user to get information in real time. The message received by the house owner’s mobile device activates the house owner of the next line of action. During the test circle, the number of times humans passed the sensor was fully captured by the PIR home-based security system and messages were received in the shortest period (3 – 5 s). The number of messages received by the mobile device of the house owner equals the number of times there was human interference. The system’s simplicity in design makes it dependable, and reliable

Minimization of Distribution Cost for a Paint Distributing Company

2025-06-29T01:06:30+00:00

This study employed Excel Solver to find the monthly total minimum and maximum costs of distributing buckets of gloss paint by Ehi-sly Enterprise Limited to its nine major customers. The monthly total minimum cost was then compared with the monthly total maximum cost and the potential saving was determined. The company has two warehouses and nine major customers dispersed within three localities, Uromi, Ubiaja and Irrua in Edo State. The monthly inventory levels of the two warehouses and the price of distributing a bucket of gloss paint from each of the warehouses to its various customers coupled with the customers’ monthly orders were used in the cost minimization and maximization. From the results obtained, it is shown that the monthly total minimum cost of distributing the ordered buckets of gloss paint to the nine customers is ₦4,384,000 as against the monthly total maximum cost of ₦8,042,500. This indicated a potential monthly saving of ₦3,648,500 which can boost the company’s profit margin.

Design and Implementation of a Wireless Automated Water Level Monitoring and Pump Control System

2025-06-29T01:45:58+00:00

Our world is facing excessive water usage either for domestic or commercial purposes and it is a serious issue, which affects the sustainability of our environment. This study investigates the design and implementation of a wireless automatic water level sensor device that can accurately detect and regulate water levels in a designated water tank or similar water storage system. The system first identifies the water level in the tank through the utilization of sensing probes. Output from the probe is encoded and transmitted through radio frequency (RF) signals, which are then received and decoded by the designated receiver. The processed information is displayed on an LCD, providing visual feedback as the system adjusts the operation of the water pump according to the water level data. This design achieves automation through the use of sequential logic, utilizing a microcontroller, an LCD, and a relay-driven motor pump circuit. The water pump is configured to engage autonomously, commencing the filling operation when the water level reaches the empty state or level ONE. It will stop operation and halt the filling process once the water level attains the maximum threshold of level FIVE. The pump will remain in a standby state from level FOUR to level TWO as the water level drops due to usage. This automated system enhances water management by minimizing human intervention while ensuring that the storage tank consistently maintains optimal water levels.