Graham Kendall Posted June 20, 2011 Share Posted June 20, 2011 Hello All, I've been thinking about building a diode matrix for one of our club layous. The problem is that with 42 individual options of route to choose from, that's a lot of push buttons on a panel. was wondering if it would be possible to employ in front of the matrix a logical integrated circuit with a small LED scren, an nfinite position rotary switch (like that on Gaugemaster's controllers, for example) and just one button as a "go" button. So that a verilog script takes in the number selected, and fires a pulse on to that line of the diode matrix? I'd be interested to hear peoples thoughts. Many Thanks Graham Link to post Share on other sites More sharing options...
Graham Kendall Posted June 20, 2011 Author Share Posted June 20, 2011 Thanks Dutch_Master, It's inteesting to know that it could be done, I'm not entirely sure my very best Vreilog is up to the job, so it was a nice thought! Oh well, another idea consigned to the "If i could just..." pile! Link to post Share on other sites More sharing options...
Graham Kendall Posted June 20, 2011 Author Share Posted June 20, 2011 OK Thanks, Is there any of the well known electrical component suppliers, Maplins, Rapid, CPC etc... that can supply PLD & FPGA modules? I last saw them on the bench in University, and that was a while ago! Link to post Share on other sites More sharing options...
meil Posted June 20, 2011 Share Posted June 20, 2011 Hello All, I've been thinking about building a diode matrix for one of our club layous. The problem is that with 42 individual options of route to choose from, that's a lot of push buttons on a panel. was wondering if it would be possible to employ in front of the matrix a logical integrated circuit with a small LED scren, an nfinite position rotary switch (like that on Gaugemaster's controllers, for example) and just one button as a "go" button. So that a verilog script takes in the number selected, and fires a pulse on to that line of the diode matrix? I'd be interested to hear peoples thoughts. Many Thanks Graham I suggest you look at MERG's CBUS Link to post Share on other sites More sharing options...
AMJ Posted June 21, 2011 Share Posted June 21, 2011 With any PLC development we were advised to work out "don't care" states so that if you use a Karnau map to simplify the logic you get a simpler circuit etc. Example used would be programming a 7 segment LED display for BCD numbers higher than 9 you don't care what the out put is! Link to post Share on other sites More sharing options...
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