This is the circuit diagram of timer on proteus software. We can use this circuit to know the duration of a particular event. You are just required to know about 7 segment interfacing. Its very simple circuit.
I have interfaced four 7-segment display to port 2. First two digit will show the minute and the last two digit will show the second. Minute will increase by one each time after completing 60 second. After pressing reset pin, it will start again.
In this circuit i have interfaced four 7-segment to port 2. You can see in the figure that each 7 segment displays different digit even if it is connected to a single port. As per rule it should all four 7-segment should display the same digit at a time. Think!!!!!!!!!
How it is possible???????
It is possible by multiplexing all the 7-segment display through one port. We can also connect each 7-segment to different port but it will require large number of pin. So that we have multiplexed them to a single port. Here we have provided delay of 0.1ms. between each 7-segment display. It cant be detected by human eye. It means only one 7-segment glows at a time. We can control it by the control pin given in each 7-segment. I have connected these control pin to p1.0, p1.1, p1.2 and p1.3. Seven segment display will not activate until its control pin is high.
If you are facing any kind of problem relate to this project then comment!!!!!
CLICK HERE TO SEE THE PROGRAM IN ASSEMBLY LANGUAGE
muralidoss
ReplyDeleteIs there any digital clock programs with seconds display in seven segment display.
thank you.