CHAPTER ONE

INTRODUCTION

1.1       Background of Study

            Time can be defined as a measurable period which an action, process, or condition exist or continues (Merriam, 2005). It is the indication of moment of a day through physical display and sound alert measured in seconds, minutes, hours and days. In the early days time has being one of the most valuable human race companions that even the creation of man was based on time. It is also seen as the numerical indication of moment using devices such as sand glass which is been translated into clocks and watches and even in some the devices we used for communication.

As time goes on, devices for time indicators are being modified for easier identification even to the level of sound alarm. The implementation of this device will serve as a good time keeper to the public and also eliminate the stress of your need for multiple cumbersome devices along when going out.

The world as it stands now can be said to be digitized in every ramification and as such, this project is aimed at looking for a way in which time will be indicated, by computing and displaying to the user using Arduino microcontroller. Also, it is of essence to use sound to alert the public on an daily basis for easy activities scheduling and to avoid letting go of some programs of the day.

1.2       Statement of the Problem

Presently, in our schools, offices and work places[M1] , people find it difficult to go on checking their phones or the wall clock, that is, if there is; it is deemed it fit to design and construct louder digital clock alarm system for everyone to know the time without stress, people see it as stressful when setting their clock alarm or handsets hourly for their daily activities. In the early days, manual indicators were used for timing such as sun, moon, shadows; cockcrow etc. for activities executed both day and night.

1.3       Aim and Objectives

The aim of this project is to design and implement the Arduino based digital clock with alarm. The objectives of this project are:

i.          To construct a clock using microcontroller.

ii.         To display date and time using seven segment display.

iii.        To alert the public of the current time.

1.4       Methodology

            The project consist of five units which are shown in the block diagram in figure     1.1

Figure 1.1:  Block Diagram of Arduino based digital clock

1.5       Block Diagram Description

The diagram consists of five blocks connected by arrow and pointers cascaded sequentially according to their operations. The blocks are; power supply, RTC module, control system, amplifier and a display unit (LCD).

i.          Power Supply: This block can be called the power house of the whole system which supplies each block with the required voltage for effective output of the system.

ii.         RTC Module: This block holds the digitized information of the clock which is being fed into the control system and also receives command signal from the control system on what to do and when to act.

iii.        Control System: This block can be to as the brain of the whole system consisting of the Arduino UNO chip, SD card memory and some other components. It receives clock information from the RTC module and sends audio signal to the amplifier and displays the time and date format through the LCD display unit.

iv.        Amplifier: This block receives audio signal from the control system and magnifies it to the desired sound and sending the amplified signal to 40watts speaker as an output.

v.         Display: This block can be called the visual display unit (VDU) of the system which displays the time and received from the control system. It can also be served as a platform for date and time pre-setting.

1.6       Project Outline

This project report comprises five (5) chapters. Chapter one is the introduction talking about the background of study, statement of problem which results to the aim and objective of the project, motivation, methodology and the project outline. Chapter two is made up of literature review, review of related project work and project highlight. Chapter three comprise construction, programming and packaging process and chapter four; testing and result. Finally, chapter five is made up of conclusion, recommendation and references.

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