DESIGN AND CONSTRUCTION HIGH LIQUID LEVEL ACTIVATED SWITCH
BY
EGBUDIWE INNOCENT .N
EE/2007/181
BEING A PROJECT SUBMITTED IN PARTIAL FULFILMENT OF THE REQUIREMENT FOR THE AWARD OF BACHELOR OF ENGINEERING (B.ENG) DEGREE IN ELECTRICAL/ELECTRONIC ENGINEERING CARITAS UNIVERSITY, AMORJI-NIKE ENUGU.
AUGUST 2017
CERTIFICATION
This is to certify that this work was carried out by, EGBUDIWE .N. INNOCENT of the department of Electrical/Electronic Engineering, Caritas University Amorji-nike, Enugu.
___________________ Date: _____________
Engr. E.C. Aneke
Project Supervisor
___________________ Date: ________________
Engr. C.O Ejimofor
Head of Department
__________________ Date: ________________
External supervisor
DEDICATION
The work is dedicated to the almighty God who with all his conglomerate efforts made my dream come true.
ACKNOWLEDGEMENT
My Profound gratitude goes to God Almighty who gave me good health and the strength throughout the period of this project. To my parents and siblings, I say a very big thank you for your financial and moral support during and after the completion of this project.
This is a device for activating a relay when the liquid level exceeds a predetermined level. Commonly used in most motor vehicles. As used in vehicles, the device consists of two parts: The sensing unit and the indicator. The sensing unit usually uses a float connected to a potentiometer, typically printed ink design in a modern automobile. As the tank empties, the float drops and slides a moving contact along the resistor, increasing its resistance. A high level liquid indicator system comprises a light-emitting indicator which is energized or de-energized by an output signal derived from a voltage comparator which receives a reference voltage from a reference voltage source and a variable voltage signal from a time delay circuit, which variable voltage signal is derived from a voltage signal generated by a fuel level sensor in a fuel tank of the vehicle. The light-emitting indicator is energized when the fuel level in the fuel tank exceed a predetermined high level, and time delay circuit operates to isolate the voltage comparator and light-emitting indicator from temporary variations in liquid level.
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