dlkosmas Posted May 21, 2004 Report Share Posted May 21, 2004 Does anyone know how to design a digital counter that produces a specific number of non-sequential number? for example( decimal) : 1,5,3,7,9,12and then repeat it using flip flops? If you know any good site i would appreciate it Quote Link to comment Share on other sites More sharing options...
Guest Posted May 23, 2004 Report Share Posted May 23, 2004 Well take an normal counter.Attach an AND gate to its output such that it selcts the number you require. Quote Link to comment Share on other sites More sharing options...
dlkosmas Posted May 23, 2004 Author Report Share Posted May 23, 2004 Yes i could,but i dont want to.I want to design it from scratch using D or JK flip flops Quote Link to comment Share on other sites More sharing options...
audioguru Posted May 23, 2004 Report Share Posted May 23, 2004 Dl,Do you want to build a random number generator? Quote Link to comment Share on other sites More sharing options...
dlkosmas Posted May 24, 2004 Author Report Share Posted May 24, 2004 NO IT IS A SPECIFIC SEQUENCE OF NUMBERS,FOR EXAMPLE : 2,5,8,2,9,1 AND THEN START OVER Quote Link to comment Share on other sites More sharing options...
MP Posted May 25, 2004 Report Share Posted May 25, 2004 where are these numbers going? are they pulses? are they displayed on a LED displayed on a LCD? tones? MP Quote Link to comment Share on other sites More sharing options...
Guest Posted May 25, 2004 Report Share Posted May 25, 2004 I feel its impossible to make the counter from a D flip flop or JK flip flop. These FF increase or decrease by the count of 1. You cannot get the sequence which you need. Quote Link to comment Share on other sites More sharing options...
MP Posted May 25, 2004 Report Share Posted May 25, 2004 It sounds as if you are looking for combinations of modulo counters, which you want to construct. Here is a link that might help you:http://www.colorado.edu/physics/phys3330/PDF/Experiment10.pdfMy personal method would be to use a microcontroller. One chip would do it all and more.MP Quote Link to comment Share on other sites More sharing options...
dlkosmas Posted May 25, 2004 Author Report Share Posted May 25, 2004 MP:the outputs are connected to LEDs which i want ot be turned ON using the outputs from the flip flops.thnx for the .pdf Quote Link to comment Share on other sites More sharing options...
Guest Posted May 26, 2004 Report Share Posted May 26, 2004 What do you want to use simple LEDs or a LED display? Dont mind but i want to ask why do you only want to make it from scratch? ???Where do you want to apply it? Quote Link to comment Share on other sites More sharing options...
dlkosmas Posted May 26, 2004 Author Report Share Posted May 26, 2004 Ok,i did it using 4 D flip flop and present state-Next state tables.Then with Karno maps i found the logical equation for each output(LED)Complex but yet doable.It is easy to do it using a microprossecor.I just want to start programmin PLDs. Quote Link to comment Share on other sites More sharing options...
dlkosmas Posted May 26, 2004 Author Report Share Posted May 26, 2004 TO moderator:PLease move this thread to the appropriate column.I posted it here by mistake Quote Link to comment Share on other sites More sharing options...
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