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Hello im new and would first like to say hi to everyone, HI!.
I am relatively new to multisim and I am trying my hand at simulating some devices that I am wishing to build into an LED array for displaying text. I am attempting to build a counter that can be used to scan a colunmn of LED cathodes at a high frequency to give the illusion of all the columns being on. The type os counter is a decade counter.
I have attached a link of the multisim 9 file that i have created in the hope that someone may be able to help me with this simulation,as when i run the sim i get different results on the logic analyser everytime, and not the wave patterns i am expecting,
I just simulated your circuit as you have it and it doesn't seem to work correctly. I replaced the word generator with the function generator and it cycled each output the way it should. Can you tell me if there is a reason to use the word generator?
On a side note. The MR (reset) has to be close to ground. What I do is tie this to ground with a 1K resistor. This makes sure that it is grounded and awaiting a reset high from somewhere else in the circuit. May not be necessary, but wouldn't hurt to have it this way to be on the safe side.
One other thing. I don't know if this was intentional or not, but in my simulations the circuit stopped after the last counter reached maximum. To get it to run continuously I had to run a wire from pin 11 of the last counter back to the MR (reset) of the first counter. At least this was the case for me anyway.
The reason for the word genenator was from my studies i was under the impression that i used the word generator with digital circuits. Thanks for the feedback i will try with the fucntion generator and see what i get.
As for the continuous cycle the intention is to have a larger counter which feedsback to a microcontroller and that will control the next cycle.
