Literature review2.0 introductionour focus in this chapter is to critically examine relevant literature that would assist in explaining the research problem and furthermore recognize the efforts of scholars who had previously contributed immensely to similar research. the chapter intends to deepen t...

Literature reviewin 1701, ole christense romer created one of the first practical thermometers. romer’s thermometer used red wine as the temperature indicator. romer created a temperature scale for his thermometer with o representing the temperature of a salt and ice mixture (at about 259k), 71⁄2 re...

Literature reviewhall and dorf (1993) states that insulation plays an important role in maintaining the performance and the safety of the electrical power apparatus. electrical power supply should ensure reliability and continuity to the utility concerned; hence the power lines and sub-stations are...

Literature reviewhistorical backgroundaccording to lee de forest, automatic voltage regulator (avr) came into existence in 1959 when he invented an autotransformer (sometimes called auto-former). and it has an electrical connection points called taps. the voltage source and the load are each connect...

Litterature reviewfrench physicist alexander edmond becquerel first discovered the means of measuring voltage easily in year 1839. it was not fully known until 1888 when lord kelvin produced the first voltmeter. according to prof.fa linemen (1932).voltmeter is an instrument that measure voltage in e...

Literature reviev2.1 early stages sometime before 1799, the first siren was invented by the scottish natural philosopher (physicist) john robison robison’s sirens were used as musical instruments; specifically, they powered some of the pipes in an organ. robison’s siren consisted of a stopco...

Literature reviewin order for me to get a broad knowledge on the project; i researched into similar sensor project that has being performed or has been finished. i explored into projects that were being designed or has been developed from several engineering associations, like cypress (chethan.asark...

Concept of the project2.1 1literature:from the late nineteenth century through the middle of the twentieth century, dc-to-ac power conversion was done using rotary cons converters or motor-generator sets (mg sets). in the early twentieth century, vacuum tubes and gas filled tubes began to be used as...

Literature review2.1 theorythe lm3914 is a monolithic integrated circuit that as well as a led at the same time,so controller senses analog voltage levels and drives 10 leds, functions including “staging” control can be providing a linear analog display. a single pin performed. the lm3914 can also a...

Literature review2.0 introductionmotion sensors are very effective in detecting burglars by their movement which greatly improves security and safety of homes. for burglars, breaching homes could even be more difficult and impossible because of the motion sensors turning the house into several layer...