Multisim and Ultiboard

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digital stopwatch circuit not working/running smoothly

I made the following Digital stopwatch circuit  using IC 7490, 7448 and cathode seven segment display on multisim and the transition between 2 and 3 and some other states isnt  smooth or is getting stuck. What modifications can be done to run this circuit perfectly ?

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Hi there,


In Multisim go to Simulate>>Mixed-Mode Simulation Settings and select Use Real pin models. This mode requires power and digital ground which you already have in the schematic.



Fernando D.
National Instruments

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I'm a multisum user. Can u please send me the circuit diagram of 4-bit digital stopwatch with the use of multisim software along with the working rule.Please help me as soon as possible. Thank u.
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