Your simulator is not giving the correct result. Mine counts 00 to 59 correctly.

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Probably he is running it on a 50-year-old computer (to match the 50-year-old TTL)

 

Do you have to do the simulation on a fifty-year-old computer?

i am doing the simulation on a mac-book pro 2017

 

Your simulator is not giving the correct result. Mine counts 00 to 59 correctly.

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what is the name of this progremme

 

You shouldn't be able to see a count of 60 on the seconds counter.

Disconnect the AND gate on the 10 seconds counter and reconnect. Maybe you made edits that confused Proteus. I have had this problem with MultisimBlue and DigitalWorls. It only happened once on DigitalWorks, but numerous times with MultisimBlue. It seemed to forget that things were connected and I got into the habit of grabbing components and moving them around to make sure the wires were still connected. Don't have to worry about that now because MultisimBlue is no longer available.

i have a race glitch in the and gate so i cant counnect the secounds couters (1 and 2) with the munits counters (3 and4)

 

what is the name of this progremme

I am using CircuitMaker 2000.

 

i have a race glitch in the and gate so i cant counnect the secounds couters (1 and 2) with the munits counters (3 and4)

There is no race glitch in the AND gate. Something else is causing the simulator to give wrong results. It would be easier and quicker for you to breadboard the real circuit.

 

i have a race glitch in the and gate so i cant counnect the secounds couters (1 and 2) with the munits counters (3 and4)

The counter is synchronous, there are no glitches or race conditions.

 

There is no race glitch in the AND gate. Something else is causing the simulator to give wrong results. It would be easier and quicker for you to breadboard the real circuit.

what is then the cause for counting from 00 to 40 without the RC circuit
in different site i saw some one call it a race glitch this is whey i add the RC circuit and it worked it start counting to 60 ,but i didnt know how to counnect the munits counter

 

The counter is synchronous, there are no glitches or race conditions.

i will change then the software and see if there is the same problem or not , also am going to use alot of ic's it's a clock after all

 

what is then the cause for counting from 00 to 40 without the RC circuit
in different site i saw some one call it a race glitch this is whey i add the RC circuit and it worked it start counting to 60 ,but i didnt know how to counnect the munits counter

It is a race glitch if you can show evidence that it is a race glitch. Adding an RC circuit that "fixes" the problem is not evidence that it is a race glitch.

Connecting to the minutes counter is a completely different issue that is trivial to solve.

 

I have verified that there is potential for a glitch when the counter transitions from 0011 to 0100.
When Q2 goes HIGH, Q1 is still falling. The solution is to delay Q2 with one AND-gate propagation delay.

 

The 74192 advances on the rising edge of the clock.
Hence, to clock the next stage, use Q2 output inverted.

 

I have verified that there is potential for a glitch when the counter transitions from 0011 to 0100.
When Q2 goes HIGH, Q1 is still falling. The solution is to delay Q2 with one AND-gate propagation delay.
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thnx i will try this solution

 

I have verified that there is potential for a glitch when the counter transitions from 0011 to 0100.
When Q2 goes HIGH, Q1 is still falling. The solution is to delay Q2 with one AND-gate propagation delay.
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whats the problem with the simulation

 

In CircuitMaker 2000, look under the Simulation tab and choose Digital Mode.

You were correct after all and we were wrong. There is a glitch at the AND gate output when the counter transitions from 3 to 4. Your circuit simulator is faster and does capture the glitch. CircuitMaker 2000 does not capture the glitch.

 

In CircuitMaker 2000, look under the Simulation tab and choose Digital Mode.

You were correct after all and we were wrong. There is a glitch at the AND gate output when the counter transitions from 3 to 4. Your circuit simulator is faster and does capture the glitch. CircuitMaker 2000 does not capture the glitch.

is this glitch will appear when i do the circuit on the breadboard

 

is this glitch will appear when i do the circuit on the breadboard

I cannot give you a definitive answer for that. It depends on a number of factors, in particular, the family of digital logic used in your circuit. Let us say that the potential for a glitch to occur is there. Your RC filter is one possible solution as it filters out a short pulse. A delay of Q2 gets rid of it entirely.

 

A delay of Q2 gets rid of it entirely.

what is the Q2

 

See post #51.

Q0 = QA
Q1 = QB
Q2 = QC
Q3 = QD

Q2 is QC of the tens 74192.

 

See post #51.

Q0 = QA
Q1 = QB
Q2 = QC
Q3 = QD

Q2 is QC of the tens 74192.

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ok i thougth it was somthing , so do you have some kink of soulotion for this probleme becouse i need a solution for this in proteus and i steel need to make this clock adjestable ,