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Design And Implementation Of An Electronic Sign Pattern Display
CHAPTER ONE -- [Total Page(s) 3]
Page 2 of 3
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TRANSISTOR
This is another three terminal semi-conducting device. It is basically made of N-type material and P-type material.
A simple transistor is of two types namely:
NPN transistor and
PNP transistor
A transistor always performs two or more functions in a circuit, it can either function as:
1. An amplifier
2. A switch.
This
functions depends on how it is connected in the circuit. In this work,
we are going to dwell much on it’s function as a switch.
The output
squared wave signal from the timer is fed to the base of the PNP
transistor this signal suffers several venations at the function of the
transistor. Finally, passed through the emitter of the transistor to
trigger the relay as required.
CIRCUIT SYMBOL
DIODE
This is
a semi-conductor device that allows current to flow only in one
direction, (depending on how it is connected in the circuit). It can be
connected in either forward or reverse direction.
CIRCUIT SYMBOL
A SIMPLE DIODE
CAPACITOR
In
it’s simple form, it is just a device or component which is used to
store electronic charge. It is known by its charging and discharging
principle. When it is connected current will flow into the capacitor
until it is full then it discharges gradually.
CHAPTER ONE -- [Total Page(s) 3]
Page 2 of 3
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ABSRACT - [ Total Page(s): 1 ]This design implementation of this electronic sequential sign post display employs the use of some specialized components. This section of the project introduces the reader to the different section of the project and the components that makes them up.Emphasis are laid on describing the behaviour and operational system of the components as related to the project modeling, analysis, design and implementation of an ELECTRONIC SIGN POST, which is made up of a power supply, a shift register, a counte ... Continue reading---
