KJiU 380 MUSICAL DOOR-BELL
M UiTM
MARA UNIVERSITY OF TECHNOLOGY BUKIT MERTAJAM CAMPUS
FINAL PROJECT
DIPLOMA IN ELECTRICAL ENGINEERING FACULTY OF ELECTRICAL ENGINEERING
PROJECT TITLE: MUSICAL DOOR BELL SUPERVISOR: CIK TANIZA BINTI TAJUDDIN
NAME: MOHD AZUAN BIN ABDUL AZIZ UiTM NUMBER: 98137647
NAME: ROSLAN BIN BAKAR
UiTM NUMBER: 98133721
TABLE OF CONTENTS
N O . T I T L E P A G E
A B S T R A C T i
A C K N O W L E D G E M E N T ii
1. I N T R O D U C T I O N 1
2. O B J E C T I V E S 2
3 . C I R C U I T D I A G R A M 3
4. C I R C U I T O P E R A T I O N S 5
5. I C T I M E R 5 55 7
6. I C 7 4 9 3 10
7. R E S I S T O R 15
8. C A P A C I T O R 18
9. S P E A K E R 23
10. H A R D W A R E D E V E L O P M E N T
> P r i n t e d - c i r c u i t b o a r d c o n s t r u c t i o n 25
> P l a n n i n g a n d la y o u t 26
> P r i n t i n g a n d e t c h in g t e c h n i q u e 27
> S o ld e r in g p ro c e s s 28
> G a n t t c h a r t ( p r o j e c t 1 ) 30
> G a n t t c h a r t ( p r o j e c t 2 ) 31
> I m p l e m e n t a t i o n f o r p r o j e c t 1 32
> I m p le m e n t a t io n f o r p r o j e c t 2 3 3
11. C O N C L U S I O N 35
12. R E F E R E N C E S 36
13. D A T A S H E E T S 37
KKU 380 MUSICAL DOOR-BELL
ABSTRACT
A MUSICAL DOOR BELL
The musical door-bell generates 16 different notes in three seconds and repeats the cycle for about ten seconds when the ‘press switch’ is pushed momentarily. This circuit consists of clock oscillator using the popular timer 1C 555, 4 bit-bmary counter 7493 and digital-to-analogue converter using four resistors. Basic audio oscillator is using a timer and an electronic delay switch. The clock oscillator is construct around 1C 555.
This clock output is fed to the ‘clock in’ of the 4 bit-binary counters or divide-by-sixteen counter. Whenever the pulse is applied at clock input, it produces a 4 bit-binary equivalent code at its four output lines. A small 8-ohm speaker connected across the output of this audio oscillator produces the musical tones.
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ACKNOWLEDGEMENT
With the name of Allah s.w.t the most gracious and most merciful, and to our prophet Muhammad s.a.w and his family. Thanks to Allah s.w.t for giving us an opportunity to complete this project successfully. We would like to express our deep sense of gratitude and appreciation to our project advisor, Cik Tamza Bmti Tajuddin and to all of our lecturers fro their help, guidance and patience during the period the completing this project.
We are grateful to all of them and we will never forget what they have done to us.
Only Allah s.w.t could pay back their kindness and we will appreciate it until the rest of our life.
Lastly, also thanks to our friends and to our lovely parents for giving us moral support and financial to do our project. Without them, we can’t complete this project... thank you very much...
Azuan - roslan UiTM Penang...
KKU 380 MUSICAL DOOR-BELL
Introduction
A musical door-bell is actually circuit that some people use for their house to knowing the people who come to their house. It easy to use and so cheap. It has function when the ‘press switch’ is pushed momentarily. If you fed up with the single-tone alarm from your digital clock, you can slightly modify the circuit and use it as a musical for your clock. This unit does not require a separate power supply as it can run off the digital clock supply.
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