All About Circuits Forum Odd/Even numbers counter.
 Register Blogs FAQ Members List Today's Posts Search Today's Posts Mark Forums Read

 Homework Help Stuck on a textbook question or coursework? Cramming for a test and need help understanding something? Post your questions and attempts here and let others help.

#1
12-13-2013, 05:11 PM
 TheSpArK505 New Member Join Date: Sep 2013 Location: Arabian peninsula Posts: 9
Odd/Even numbers counter.

Hello guys.

I need to design a counter that works as (even x=0/odd x=1) numbers counter. I,m having difficulties with state diagram.when I begin at 000,x=0 should I stay at this state and when x=0 should I go to 001. And what about the state after this,is it 001,x=0 I go to 010,when x=1 should I go to 011. Is that correct.

#2
12-13-2013, 05:45 PM
 ScottWang Senior Member Join Date: Aug 2012 Location: Taiwan,Asia (GMT +8) Posts: 1,593 Blog Entries: 7

Converting all of the functions to the truth table, and using the truth table to build the circuit.
#3
12-13-2013, 06:36 PM
 TheSpArK505 New Member Join Date: Sep 2013 Location: Arabian peninsula Posts: 9

do you mean that the states transitions I mentioned are correct.
#4
12-13-2013, 07:04 PM
 ScottWang Senior Member Join Date: Aug 2012 Location: Taiwan,Asia (GMT +8) Posts: 1,593 Blog Entries: 7

You can see the truth table of CD4518, and then talk about what you think.

CD4518 datasheet - to see the truth table on the first page..
#5
12-13-2013, 07:45 PM
 tshuck E-book Developer Join Date: Oct 2012 Location: Long Beach, CA Posts: 3,015 Blog Entries: 1

What does the prompt say? Since you are designing it, it could reasonably do any number of things and still count odd and even.

Does this count up? Down? How many bits (from your example, it looks like 3)? What approach? Synchronous?

You need to be much more specific.
#6
12-13-2013, 08:57 PM
 WBahn Senior Member Join Date: Apr 2012 Location: Larkspur, Colorado Posts: 8,077 Blog Entries: 9

Quote:
 Originally Posted by TheSpArK505 Hello guys. I need to design a counter that works as (even x=0/odd x=1) numbers counter. I,m having difficulties with state diagram.when I begin at 000,x=0 should I stay at this state and when x=0 should I go to 001. And what about the state after this,is it 001,x=0 I go to 010,when x=1 should I go to 011. Is that correct. Help me please.
You need to post your best effort at coming up with a state diagram.

Foe each state, describe what, precisely, being in that state means. A good way to do this is to finish the following statement for each state:

If you tell me that I am in state xxx, then I know yyy about the system.
#7
12-13-2013, 10:06 PM
 djsfantasi Senior Member Join Date: Apr 2010 Location: Northeast US Posts: 1,029 Blog Entries: 1

I am curious? What is "x"? Is it an input to the logic or an output from it?

And what is the three bit value you are showing? Is it the counter value? How does the circuit count? Is there a separate input to tell the circuit to count?

Try defining the obvious state transitions, first. The others may become clearer after that.

For example, if the counter value is 010 and x=0, what is the next state/value of the counter? Does it or does it not make sense to have the next state be 011?

Just trying to some clarity of your problem.
__________________
- Δj' fαπταi

 Tags counter, numbers, odd or even

 Related Site Pages Section Title Worksheet Encoders and decoders Video Lecture Completing Truth Tables - Digital Textbook The R/2R DAC : Digital-analog Conversion Textbook The R/2 n R DAC : Digital-analog Conversion Textbook Ring counters : Shift Registers Textbook 3-bit binary counter : Digital Integrated Circuits Textbook Don't care cells in the Karnaugh map : Karnaugh Mapping Textbook Multiple-input gates : Logic Gates Textbook Digital signals and gates : Logic Gates Textbook Negative binary numbers : Binary Arithmetic

 Similar Threads Thread Thread Starter Forum Replies Last Post OMMad Homework Help 5 11-19-2010 01:02 AM idmond The Projects Forum 6 10-13-2010 02:11 PM roger101 Embedded Systems and Microcontrollers 13 07-24-2009 10:52 AM Nirvana Math 2 01-14-2008 09:58 AM

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Electronics Forums     General Electronics Chat     The Projects Forum     Homework Help     Electronics Resources Software, Microcomputing, and Communications Forums     Programmer's Corner     Embedded Systems and Microcontrollers     Computing and Networks     Radio and Communications Circuits and Projects     The Completed Projects Collection Abstract Forums     Math     Physics     General Science All About Circuits Commmunity Forums     Off-Topic     The Flea Market     Feedback and Suggestions

All times are GMT. The time now is 12:38 PM.