Hello, I have this problem when i simulate the circuit on proteus the counter will stay at 00. I am using ne555 as pulse, 74ls192 as up/down counter. I don't know what is the problem/error on my circuit. Anyone who can help me with this? Thank you for the response.

here is my schematic diagram

 

hi jony,
One point is when you press Reset you short out the VCC, also what Vfwd is the LED?
E

 

What have you done to try to track the problem down?

Have you looked at your clock signal to see if it is actually what you expect? If not, then that's where to focus your search efforts.

As @ericgibbs pointed out, you've got some major issues that would prevent any real-world implementation from working. I have no idea how Proteus is going to deal with them.

 

I don't know what is the problem/error on my circuit. Anyone who can help me with this?

The 74LS192 datasheet says that the BI/RBO pin can be left open, but I have no idea how Proteus treats floating inputs. Try connecting it to VCC.

Your drawing style makes your schematic tedious to read. Avoid unnecessary wire jogs and crossings. The pin order on the timer symbol isn't conducive to representing standard timer configurations (inputs should be on the left side, though reset on the top makes sense in this case). The capacitor is backwards. Obviously, Proteus doesn't care...

Your lack of current limiting resistors is disconcerting.

 

Anyone who can help me with this?

For starters add resistors R1-R4.

 

Hi Jony,
Is this project a College assignment?

Moderation.

 

here is my schematic diagram

When I'm simulating counters, I sometimes don't follow the preferred left to right flow in situations where I find right to left easier to read:

It also helps if you have symbols that facilitate the desired flow. In DigitalWorks, you have to make macros for all commercial parts. The ones it includes are brain-dead pin order symbols.

The simulator I use is digital-only. It doesn't have resistors and the concept of logic families is foreign. So I can mix TTL and CMOS without regard to voltage levels or drive capabilities.

 

For starters add resistors R1-R4.
View attachment 309859

Missed that. More floating inputs...

This is one of the very few cases where a colored schematic would have been helpful to see how Proteus was treating them.

 

hi jony,
One point is when you press Reset you short out the VCC, also what Vfwd is the LED?
E

I fixed that part but it’s the same still at 00. And the led was 2.2 V.

 

I fixed that part but it’s the same still at 00. And the led was 2.2 V.

DId you correct the floating clock inputs?

 

Hi Jony,
Is this project a College assignment?

Moderation.

Yes. And we need to implement this on breadboard.

 

DId you correct the floating clock inputs?

Yes, still giving me the same output.

 

Yes, still giving me the same output.

Post your updated schematic.

 

The 74LS192 datasheet says that the BI/RBO pin can be left open, but I have no idea how Proteus treats floating inputs. Try connecting it to VCC.

Your drawing style makes your schematic tedious to read. Avoid unnecessary wire jogs and crossings. The pin order on the timer symbol isn't conducive to representing standard timer configurations (inputs should be on the left side, though reset on the top makes sense in this case). The capacitor is backwards. Obviously, Proteus doesn't care...

Your lack of current limiting resistors is disconcerting.

Sorry, I did it for multiple times, changes the wiring. So my schematic is messy.

 

What have you done to try to track the problem down?

Have you looked at your clock signal to see if it is actually what you expect? If not, then that's where to focus your search efforts.

As @ericgibbs pointed out, you've got some major issues that would prevent any real-world implementation from working. I have no idea how Proteus is going to deal with them.

Yes, I searched for it since last week. Still don’t know what’s the problem.

 

Post your updated schematic.

here

Post your updated schematic.

here

 

Hello, I have this problem when i simulate the circuit on proteus the counter will stay at 00. I am using ne555 as pulse, 74ls192 as up/down counter. I don't know what is the problem/error on my circuit. Anyone who can help me with this? Thank you for the response.

here is my schematic diagramView attachment 309856

Upload your proteus project file and I'll take a look...

 

Upload your proteus project file and I'll take a look...

I can't upload it in here directly. But you can open it here. Thank you.
the schematic is in the root sheet 2.

 

I can't upload it in here directly. But you can open it here. Thank you.
the schematic is in the root sheet 2.

That didn't help.
Zip up the project file then post.

 

Yes, I searched for it since last week. Still don’t know what’s the problem.

That tells me nothing useful. HOW did you search for it? What signals did you check? Which ones worked? Which ones didn't?

Post a screenshot of your clock signal at the point where it goes into the digital chips.

If that signal isn't good, not much else has a chance.