K-MAPS Tips or Tricks

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GISdude Associate Join Date: Jun 2007 Location: Sacramento, CA Posts: 33	K-MAPS Tips or Tricks 02/22/2013 1:32 PM
	Hi all, I'm having trouble with K-MAPS. I think a 2 input truth table for a gate is pretty simple and straightforward, <B>BUT</B> the 3 input one throws me for a loop. How does one get go from the inputs 00, 01, 11, 10? It should go like 00, 01, 10, 11. Right? Just like an AND gate truth table. It seems counter intuitive. I've looked on several websites for tutorials and on youtube, but no one has explained it well. Any tips would be great, Randy __________________ gisdude
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70AARCuda Guru Join Date: Jan 2008 Location: Tucson, AZ Posts: 1331 Good Answers: 30	#1 Re: K-MAPS Tips or Tricks 02/22/2013 3:19 PM
	If you know BASIC programming, there's a Quine-McCluskey truth-table-reducing program detailed in the April 26, 1990 issue of EDN magazine on pages 234, 236 and 238. Here's a YouTube video: http://www.youtube.com/watch?v=b4JiIknHm1Y __________________ ...and the Devil said: "...yes, but it's a DRY heat..!"
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NotUrOrdinaryJoe Guru Join Date: Apr 2008 Location: Lexington, KY Posts: 1639 Good Answers: 73	#2 Re: K-MAPS Tips or Tricks 02/25/2013 7:35 AM
	The rule is that for inputs, only one variable can change at a time. That is why the sequence seems goofy. If you violate that rule, then K-maps don't work. That little nugget is easy to miss when learning about K-maps. Using it will keep you out of trouble when you go to something larger than 2 inputs. It is the only way I can remember the sequence when I need to do the same. __________________ A great troubleshooting tip...."When you eliminate the impossible, whatever remains, however improbable, must be the truth." Sir Arthur Conan Doyle
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GISdude Associate Join Date: Jun 2007 Location: Sacramento, CA Posts: 33	#3 In reply to #2 Re: K-MAPS Tips or Tricks 02/26/2013 12:51 PM
	Joe, I think a light bulb just clicked on... That tip was very useful. Many thanks, __________________ gisdude
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