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#1
01-18-2010, 09:06 PM
 slider203 New Member Join Date: Jan 2010 Location: Canada Posts: 2
Design a counter using JK flip flops

Hello I am doing the grade 11 computer engeneering course and I was doing my homework when I got stuck on a question that says "Design a counter using J-K flip flops that will count in the following sequence: 0,2,5,1,3" would some one please help a newbie like my self make this counter. I have been trying for hours and still dont know how to do it.
Thanks any help is apperciated

EDIT: beenthere first we have to create a truth table (I did that)

t t+1
Q2 Q1 Q0 Q2 Q1 Q0
0 0 0 0 1 0
0 1 0 1 0 1
1 0 1 0 0 1
0 0 1 0 1 1
1 1 1 0 0 0

then we had 2 draw truth tables did that too.
but then we have to make the truth tables into a diagram thats were Im getting stuck...this is what the diagram looks like:
____________ __________ ___________
|J2 Q2 | |J1 Q1| |J0 Q0|
| | | | | |
O>CLK | O>CLK | O>CLK |
| _ | | _ | | _ |
| K2 Q2| |K1 Q1 | |K0 Q0 |
--------------- ------------- -------------
(I know its a bit rough but you get the idea..I hope)

Last edited by slider203; 01-20-2010 at 01:48 AM.
#2
01-19-2010, 02:17 PM
 beenthere Senior Member Join Date: Apr 2004 Location: Missouri, USA (GMT -6) Posts: 15,815 Blog Entries: 10

Can you show us your work? We may be able to see where you got stuck.
__________________
First comes the hardware, then the software.
#3
01-19-2010, 04:59 PM
 t06afre Senior Member Join Date: May 2009 Posts: 5,939

try Google and the term karnaugh synchronus counter. This should get you started
#4
01-19-2010, 06:48 PM
 knowitall Junior Member Join Date: Jan 2010 Location: Ronan Montana U.S.A. Posts: 17

Are you allowed to use any additional componants, like diodes or decoders,or a reset switch?
#5
01-20-2010, 01:31 AM
 slider203 New Member Join Date: Jan 2010 Location: Canada Posts: 2

we can use a reset switch also we are using the chips 7490, 7992, 7493
#6
01-20-2010, 01:39 AM
 beenthere Senior Member Join Date: Apr 2004 Location: Missouri, USA (GMT -6) Posts: 15,815 Blog Entries: 10

Get the data sheets for those chips - you might be surprised to see what they are. Google "sn7490", sn7492, sn7493" and follow the links for the data sheets.
__________________
First comes the hardware, then the software.

 Tags counter, design, flip, flops

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