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counter and 7-segment decoder problem

muttu.sarve

New Member
HI every one,
I'm new to pic programming and i'm working on a project. i'm planning to use pic16f877.and please suggest me which oscillator i can use in this project.
the project is go like this...the project consist of 4*4 keyboard, 5 output LEDS, 8 digital outputs to drive another circuit, seven (7) digit 7-segment
display, 1 sesor input which will get a signal from sensor. which is used to find out motor rotation. the sensor is connected to 24v ac motor(1400rpm).
As the shaft of the motor rotate once then the sensor work once. the sesor input is taken as counter and which will be dispay in the 4 digit 7-segment.
as pic16f877 has 32 I/O pins so i need to use 7-segment decoder in this project. the problem is..
1. i want to know the circuit diagram for 7-segment decoder with sample code for this project.
2. when the motor rotates with full speed then within 4second shaft will rotate 100 times so i'm dont know how to program for this. mean while my sensor is working as
counter and i need to display the same count in 7 segment display. so please help me.. its urgent.


thanking you..
 
How many displays do you want to drive?

so please help me.. its urgent.

You have left it too late. This is an enormous undertaking.
It will take at least 3 days to write the program.
 
thanks for replying.. it got 7 individual 7-segment displays.. i got enough time now as i'm working on it so please help me to solve this issue.
 

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