Abstract
Design and Construction of an Automatic Emergency lighting System with Battery Over-Charge Protection Circuit
Highlights
Since power failure is a common phenomenon in Nigeria, the need for an alternative source of illumination in our homes, workshops, offices etc. becomes a viable option
We have decided to opt for a fluorescent lantern rather than Light Emitting Diode (LED) lantern because of the availability of the fluorescent tube and the ease of replacement when it goes bad
According to (Adegbemile, 2008), the most reliable approach is the use of blocking oscillator which acts as an electronic ballast to generate the requisite high voltage to strike the fluorescent tube
Summary
Since power failure is a common phenomenon in Nigeria, the need for an alternative source of illumination in our homes, workshops, offices etc. becomes a viable option. (Wikipedia, 2011) Use electrical choke as a ballast to provide high voltage to ignite the fluorescent tube This approach has gone anachronistic and is no longer common. According to (Adegbemile, 2008), the most reliable approach is the use of blocking oscillator which acts as an electronic ballast to generate the requisite high voltage to strike the fluorescent tube. This saves much energy and is much efficient (Glen, 2008). Rechargeable fluorescent lantern is shown in figure 1 It features a battery charger, a battery charge monitoring circuit, a switching circuit, a regulating circuit, a blocking oscillator, an inverter and a 40watts fluorescent tube
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