COUNTDOWN TIMER USING 8051 MICROCONTROLLER PDF

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Currently i faced some problem on my lcd screen. I'm i missing out something? I agree with nielsen that the logic is wrong. You may consider following approach to update all the variables properly at every millisecond tick. Remember that zero is a valid value! I'll suggest that you rewrite the code so that you check for zero before decrementing.

You check seconds, seconds is zero. You check minutes, it is now 0. So you subtract 1 from hours. Hours is already zero. IMHO it would be better to have only msecs and convert to hours:minutes:seconds only when you update the display if you need. Learn more. Asked 5 years, 4 months ago. Active 5 years, 4 months ago. Viewed times. Fufu Alex Fufu Alex 39 1 1 silver badge 8 8 bronze badges.

Active Oldest Votes. Sunil Shahu Sunil Shahu 1 1 gold badge 7 7 silver badges 20 20 bronze badges. Sunil, FuFu Alex: Notice that the example here is a little bit wrong. The last else is wrong. That point will be reached 1 tick too late! In fact there should be a check outside and after topmost if.. Thanks both of you for the explanation. Very appreciated. Your logic is pretty wrong. You have 0H : 1M : 0S.

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Simple Digital Countdown Timer using 7-seg Display

Manoj S. Kavedia ā€” ā€” ā€” profmanojkavedia gmail. Countdown timer using microcontroller AT89C This countdown timer counts backwards from a set value and raise an alarm when the counting is complete. It also has a feature of pause.

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Countdown Timer Using 8051 Microcontroller (AT89C51)

Rickey's World Toggle sidebar Login Toggle sidebar. Login Please Enter Your Information. Remember Me Login. I forgot my password. I want to register. Back to login. Simple Digital Countdown Timer using 7-seg Display.

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Timers in 8051 microcontroller

By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Currently i faced some problem on my lcd screen. I'm i missing out something? I agree with nielsen that the logic is wrong. You may consider following approach to update all the variables properly at every millisecond tick.

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