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PROJECT PROPOSAL Project name Adjustable Countdown Timer Subject Microcontrollers Group members S.A.Wakeel Class # 27 S.Afaq Ali Shah Class # 57 Instructor Engr.Haider Zaman

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Page 1: Project Countdoawn Timer

PROJECT PROPOSAL

Project name Adjustable Countdown Timer

Subject Microcontrollers

Group members S.A.Wakeel Class # 27

S.Afaq Ali Shah Class # 57

Instructor Engr.Haider Zaman

Submission date 8th December 201

Page 2: Project Countdoawn Timer

ADJUSTABLE COUNTDOWN TIMER

Components Used In Project

7 segments displays, PIC16F84 Microcontroller, PNP transistors, buzzer, push buttons, 5V power supply , resistors, oscillator capacitors etc.

Circuit diagram

Working principle

Adjustable countdown timer actually works on the reverse counting of adjustable time. Means we have to set the time in it and it will start counting from the adjustable time to zero sec until the buzzer starts wailing.

Why I have selected this project.

Page 3: Project Countdoawn Timer

Actually this project is easy and understandable for everyone also adjustable countdown timer find it’s application in so many electrical appliances e-g microwave oven, washing machine, quiz timer, automatic switching etc.


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