Multisim and Ultiboard

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Please, help with the counter 74LS90

Ah...

Thank you...

I put a "or" connecting Vcc and output the second counter.

Now it's working 100%.

You are good people.
🙂

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In this new circuit just run a line from the first IC's RO1 and R02 pins to the same pins on the second IC. This will give you a master reset on both IC's at the same time. I am not sure if you would have to do this with with the "real circuit" or not, but Lodin makes a good point that it may be necessary to do it on the "real circuit" also. In the case of the "real circuit" I would use an RC Network like Chris pointed out. To do this you would run a capacitor from VCC to the R01 and R02 pins tied together and then run a resitor from there to ground.

This master reset methods decribed are going to have to be done with a majority of IC's in Multisim because most of the ones I have encountered do come up random.

I hope this helps. All these ideas are good ones and it is up to you to decide how to use them.

 

Kittmaster's Component Database
http://ni.kittmaster.com

Have a Nice Day
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