countdown timer code - Electronic Circuits Projects Diagrams Free

ah_Hui · 26th April 2004, 05:30 PM

I'm new to electronics and currently using Atmel 89c51 for my project.
Part of the project is a countdown timer with 4 units of 7segment display.
Once the timer reaches zero, it will trigger a dc motor.
Can some one provide me some idea on how to write the timer part?
Perheps can show me a sample code with only a digit of 7segment as a countdown timer for my reference...in addition, a button is added to increment the timer digit...
I referred to 8052.com and found a useful tutorial there providing me on how to trigger the motor once the timer reaches zero.
I'm stuck on the timer display part...

thanks

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26th April 2004, 05:30 PM	(permalink)
ah_Hui	countdown timer code I'm new to electronics and currently using Atmel 89c51 for my project. Part of the project is a countdown timer with 4 units of 7segment display. Once the timer reaches zero, it will trigger a dc motor. Can some one provide me some idea on how to write the timer part? Perheps can show me a sample code with only a digit of 7segment as a countdown timer for my reference...in addition, a button is added to increment the timer digit... I referred to 8052.com and found a useful tutorial there providing me on how to trigger the motor once the timer reaches zero. I'm stuck on the timer display part... thanks