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Implementation for count down timer project.
- Essay length: 2165 words
- Submitted: 16/05/2012
The first 200 words of this essay...
Project Title: Countdown Timer
The primary aim of this project is to integrate the skills and the knowledge gained through the various modules in the Higher National Diploma in the Electrical and Electronics Engineering program.
A countdown timer for examination with hour, minutes and seconds display can adjust the period of time (hour and minutes). The time will be display with seven segment display, 1 for hour, 2 for minutes, and 2 for seconds.. When the time period is finished, the relay will start and external output electronic device can be started.
Switching on a free voltage contact in the remote countdown input, a countdown with the interval programmed in Top parameter is started. If the remote countdown input is switched on when a countdown is already running , a new countdown is started with the interval programmed in Top parameter.
When the countdown starts the relay output is closed and the message "run" is displayed. When the countdown expires, or it is stopped by the user by pressing the SET key for one second, the relay is open again and the message End is shown (if Bc
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