ABSTRACT

The AVR is an automatic voltage regulator and it is a device which

is used to regulate or stabilize electrical power supply for electrical or

electronic appliances.

Inthisprojecttherefore,weareinterestedintheconstructionof

this allimportantdevice.Furthermore we shalldiscuses the

techniques,processes,switching stages and then the working

principleoftheautomaticvoltageregulator

Chapteroneofthisprojectdwellsontheintroductionofthe

projecttopic.Italsotalksabouttheobjectivesoftheproject,bringing

tomindwhatweintendtoachieveattheend

Chaptertwooftheprojectreviewstheresearchworksthathas

beencarriedoutbysomeotherpeopleinthisstudyarea.Italso

discussesonsomeofthecomponentsusedinthisproject

Chapter three gives a detailed account of the basic

constructionandtheoperationoftheAVR.Italsohighlightsonsome

othercomponentsused,discussingtheirworkingprinciplesusing

boththecircuitandblockdiagrams

Chapter four of this project,draws the conclusion an

consequently gives the recommendation on how to betterthe

operationoftheAVR.Italsoincludesthereferencesandarticles

consultedinthecourseofthisproject.

TABLEOFCONTENTS

Certificationpage - - - - - - - i

Abstract - - - - - - - - - ii

Acknowledgement - - - - - - - iii

Dedication- - - - - - - - - iv

Tableofcontent- - - - - - - v-vi

CHAPTERONE

1.1Introductiontoautomaticvoltageregulator- - 1-3

1.2Objectivesoftheproject- - - - - 3-4

CHAPTERTWO

2.0Literaturereview - - - - - - 5-7

2.1Someofthecomponentsused - - - 7-8

2.2Resistors - - - - - - - - 8-9

2.3Capacitors - - - - - - - - 9-10

2.4Transistors - - - - - - - - 10-11

2.5Relays- - - - - - - - 12-14

CHAPTERTHREE

3.0BasicconstructionandoperationoftheAVR - 15

3.1ComponentsofAVR - - - - - 16

3.2Transformers- - - - - - - 16-19

CircuitdiagramoftheAVR - - - - - 20

3.3Theworkingprinciple - - - - - 21-22

3.4ThemainfunctionoftheAVR - - - - 23-24

3.5Theneedforvoltageregulation/stabilization - 25-26

3.6Solderingandsolderingtechnique.............27-28

3.7Testingandtrouble-shooting................28-29

3.8Projectcasing...........................29-30

CHAPTERFOUR

4.0Conclusionandrecommendation - - - 31

4.1Conclusion - - - - - - - 31-33

4.2Recommendation - - - - - - 34

Reference - - - - - - - - - 35