hi to all. could someone help me make an up/down counter.
i'm having problems in making my circuit work.

 

hi to all. could someone help me make an up/down counter.
i'm having problems in making my circuit work.

You left out the connection between pins 4 and 6....

If fixing that doesn't help, perhaps more information is in order...

 

hi,
These are 3 decade Up/Down counters, just add another stage for 4 decades.
E

 

i'm using 7447 instead of 74247..
is that possible?


and can that circuit be set to start to a certain number?

thanks for the reply.

 

Hello,

The 7447 and 74247 are comparable.
The 247 is most likely a newer version.
Take a look at the internal schematic of both.

Bertus

 

Hi,
The pin outs for the 7447A are the same as the 74LS247, so they should be OK.
E

 

Hello,

The 7447 and 74247 are comparable.
The 247 is most likely a newer version.
Take a look at the internal schematic of both.

Bertus

ok thanks alot..
what about 74192, im using 74193 are they comparable?

 

hi,
No,
One is a binary counter [193]and one is decade counter.[192]

 

Hello,

Have a look in a datasheetbook.
The MIT has one as handout:
web.mit.edu/6.111/www/f2009/handouts/scyd013.pdf

Bertus

 

hi,
These are 3 decade Up/Down counters, just add another stage for 4 decades.
E

can i use that circuit for multiflexing?
i am suppose to change the number of each digit using an up/down counter.
and if possible can you tell me how?

 

So, this is an assignment for school. Why didn't you start off saying that?

Why don't you post YOUR circuit that you seem to be having trouble with?

We're not here to do your homework for you, as you wouldn't learn how to do it yourself. If you are really stuck and can't figure something out, we can help you past that point.

 

here is the schematic diagram that I found in the internet..
i couldn't make it work..

 

Don't try to fool us. You really didn't build this circuit.

 

here is the schematic diagram that I found in the internet..
i couldn't make it work..

Is there any work you have done yourself on your homework?

Please make a legitimate effort on solving your homework problem first, before consulting the internet - including asking us.

 

I mostly build decimal counters with 40110 along with a good debouncer.

 

Don't try to fool us. You really didn't build this circuit.

no i didnt...
i said "I found" that means i searched that...
i was hoping that if someone can tell me why even if i connect the circuit it wont work...

 

no i didnt...
i said "I found" that means i searched that...
i was hoping that if someone can tell me why even if i connect the circuit it wont work...

One of two reasons it won't work:
1. You hooked it up wing
2. The schematic is wrong

There are many reasons that could have gone wrong in either process. For is to tell you what you did wrong would require knowing what you did - something you haven't been very forthcoming with....

 

I said "build this circuit", not "design this circuit".

We know you didn't design the circuit. We also know you didn't build the circuit.

So how do you know whether or not the circuit works?

 

Hello Mhine28

The circuit contained in the image that you enclose, is not quite right.
Look at the notes I added in it. (In black and red line)

Many of the circuits that we found on the internet do not work.
This is another case.

It is easier and faster if you look around here on the forums trying to find a Up-Down circuit that meets your requirements.
You also need to study the data sheets from the ICs you intend to use
You can get them at this link: http://www.alldatasheet.com/

 

Hello Mhine28

The circuit contained in the image that you enclose, is not quite right.
Look at the notes I added in it. (In black and red line)

Many of the circuits that we found on the internet do not work.
This is another case.

It is easier and faster if you look around here on the forums trying to find a Up-Down circuit that meets your requirements.
You also need to study the data sheets from the ICs you intend to use
You can get them at this link: http://www.alldatasheet.com/

thanks for the info.
and thanks for helping me out coz im just a newbie..