DESIGN

This research project provides a solution which would help enable the ease of navigating through a new campus environment as every year there are new students in every university. In this study, I highlighted the importance of the campus navigation system using University Of Benin, ugbowo, as a case study. Agile methodology was adopted for this project, and a few data collection method was adopted. This study evolved into a feasible navigation system, which would help ease the confusion that comes with entering a new university campus

The primary pursuit of this project was to determine the response of a manufactured sub frequency amplification loudspeaker system capable of amplifying frequencies between 45 Hz through 125 Hz. Secondly, a 2000 W class AB power amplifier was also designed and manufactured to specifically power this loudspeaker design. Finally, using transfer function measurements, the critical identification and analysis of the character of the output wave forms in diverse listening spaces was done. This project was carried out using a low frequency transducer/driver of size 18 inches, made of Neodymium permanent magnet, a copper voice coil of 4-inches, and a diaphragm made of sturdy paper film. This driver/transducer is tightly suspended within a casket which comprises of a robust acoustic (wooden) compartment made of birch plywood of thickness 4 millimeters(4mm), with an internal rigid structure, critically designed in a bandpass configuration for maximum acoustic power output within which the transducer is
immersed/suspended and made to resonate. The CLASS AB power amplification system was specifically manufactured using bipolar junction transistors, give a maximum output power of 2000 W. This was chosen since an efficiency of about 75% can be gotten. In order for the frequency/amplitude response to be got, we used several third-party measurement softwares to determine and analyze various response traces using sweeps and test signals in various listening spaces. The third party software include: RATIONAL ACOUSTICS SMAART V8, ROOM EQ WIZARD(REW), DECIBEL-X. And finally, for the determination of the dispersion(horizontal and vertical) characteristics, the acoustic behavior of our wave fronts and the simulation of our response respectively was predicted using: EASE FOCUS 3 and MEYER SOUND SIM

In this paper, a wireless power transmission (WPT) using resonant magnetic coupling for mobile phone charger is presented. Solar energy was used as the energy source to address the scarcity of non-renewable energy sources and tackles the constraints of wired charging technology such as lack of a universal electrical standard, untidiness and inconvenience of wires and wires' wear and tear. The system includes PV panels and battery, oscillator, transmitting coil and receiving coil and rectifier. Proteus 8.1 was used to simulate before implementing in the hardware. The resonant magnetic coupling resonated at 800 kHz ± 10 kHz. The maximum distance to charge a mobile phone was 4 cm at 3.7 V. All the objectives are achieved within the limited time frame. The significance of the project can help to eradicate the use of wires and the need of power plugs. The future research includes the study of efficiency, coil design, system with multiple loads.