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up down counter

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hardcore misery said:
schematic diagram of up down counter using 74ls192


Okay. Now what?
 

Attachments

  • up-dwn cntr.PNG
    up-dwn cntr.PNG
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hardcore misery said:
we need the schematic before wednesday,, i've search through google, can't find anything
We don't mind helping you but we won't do all of the work for you. Please post what you've already done including any ideas you've had and we might be able to make some suggestions. If you've got completely no idea then may be it's your lecuturer's fault and it isn't right that you make him/her look good by cheating and copying from the Internet.
 
yeah, our instructor didn't teach the wiring of this counter, so we don't have any idea... but thanks for the response, i'll report to all of you if i've done something...

godbless,,
 
Up and down misery.

Hi Hardcore mysery,

First things first, when you start designing a circuit with TTL or CMOS
logic you've got to make a choice. If you start with TTL you have to
continue with TTL unless you've got good reasons to do otherwise.
The 6 volts supply voltage will do fine for the 4511 but it will be too
much for the 74LS192 which runs only at 5 volts +/- 0.25 volts.
So you'll have to reduce the 6 volts to 5 volts or change the 74LS192
to a 74HC192.
The 4511 was designed to drive common cathode displays, not a common
anode display like the one in your circuit. So you gonna have to replace
the common anode display by a common cathode display and connect
the common cathode to GND, or . . . replace the display driver by a
74XX47 or a 74XX247 or similar.
Now it's up to you, what are you going to do ?
What parts do you already have ?
You can already make some changes to your schematic:
Connect Q0 to D0, Q1 to D1 and so on.
The 10k resistors R8 . . . R11 can be removed from the circuit, I can't
think of any reason to keep them there.
I need to take a pill. :D

on1aag.
 
It is always good to download Datasheet of the components..
where should i connect the Count up Clock input pulse and count down input pulse? and the terminal count down and terminal count up?
See datasheet.

Sir, how can i connect the 74ls192 to the supply? i don't know the configurations... please help me out
.
See Datasheet

do you have any schematic diagram of up down counter using 74ls192 and 7447?
See Datasheet

Once again
It is always good to download Datasheet of the components..
 
on1aag is on a distinguished road


Default Up and down misery.
Hi Hardcore mysery,

First things first, when you start designing a circuit with TTL or CMOS
logic you've got to make a choice. If you start with TTL you have to
continue with TTL unless you've got good reasons to do otherwise.
The 6 volts supply voltage will do fine for the 4511 but it will be too
much for the 74LS192 which runs only at 5 volts +/- 0.25 volts.
So you'll have to reduce the 6 volts to 5 volts or change the 74LS192
to a 74HC192.
The 4511 was designed to drive common cathode displays, not a common
anode display like the one in your circuit. So you gonna have to replace
the common anode display by a common cathode display and connect
the common cathode to GND, or . . . replace the display driver by a
74XX47 or a 74XX247 or similar.
Now it's up to you, what are you going to do ?
What parts do you already have ?
You can already make some changes to your schematic:
Connect Q0 to D0, Q1 to D1 and so on.
The 10k resistors R8 . . . R11 can be removed from the circuit, I can't
think of any reason to keep them there.
I need to take a pill.

on1aag.


sir, i've already did some modifications to the circuit... what i'm doing is to simulate the circuit first on the
Circuit Maker software....

i've used the 74LS192, 74LS247 and 7segment display, common anode...

i've used 5VDC as a supply...

as you have said, Q terminals of LS192 should be connected to D terminals of itself.

how about the CPU,CPD and TCU,TCD?

where should i connect 2 switches for up and down counter?

as for 74LS247, where should i connect the A terminals of it? the TEST, RB1 and RB0 terminal?

all i know is the abcdefg terminals should be connected directly to the 7seg display..


as for the datasheet, i expect that i would know where should the terminals be connected to other IC.
but i can't understand those...

these is a final project for our Logic Circuits subject, and our schedules were hectic because of
our final exams, so i'm just making some quick actions for my group(those groupmates were useless)

so please be patient with me... thank you...
 
This simple project is way above your small amount of understanding of logic circuits. Do gardening instead.
 
Up and down mystery.

Hi Hardcore Misery,

The seven 470 :eek:hm: resistors should stay in the circuit to limit
the current through the segments of the display.
OK, check this out.

on1aag.
 

Attachments

  • up & dn counter.GIF
    up & dn counter.GIF
    9.4 KB · Views: 2,914
Last edited:
This is for u.

I make this circuit just for u....
Below are the Pictures of the ciruit and I also attached Circuit Maker Files, It mean U don't need to make circuit, Just Unzip and Open files in circuit Maker. One File for Simulation and the Other For when u will make this circuit on BreadBoard...
In Circuit maker u not need to Give Supply to Digital IC's But when u will make in Real then u will give Supply to them...

See data sheet for Pin configuration
https://pdf1.alldatasheet.com/datasheet-pdf/view/12614/ONSEMI/74LS192/datasheet.pdf

Make Beautiful Diagram Like ME

Try to Learn Circuit Maker

I am waiting for ur Reply..
After making circuit Show ur Result here......
 

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  • Runing Circuit.GIF
    Runing Circuit.GIF
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  • Circuit For making.GIF
    Circuit For making.GIF
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  • CounterCircuits.zip
    4.1 KB · Views: 459
Up and down counter.

Hi Hardcore misery,

About the 74LS247, BI/RBO is a wired AND and can be used
as an output or as an input and should
be left open. If you want to blank the
display you are allowed to connect it to
GND, however it should never be
connected directly to +5 volts.
About the 74LS192, the connections between Q0 . . . Q3 and
D0 . . . D3 should be removed.
It's good design practice to connect
them to a logical "0" or a logical "1".
PL should be connected to +5 volts.
MR should be connected to GND.
The 22 nF capacitors accross R12 and R13 are missing.
The 220 µF capacitor is also missing and the value of R14 should
be reduced to 1K:eek:hm: , otherwise the oscillator will not work and
the output of the gate will be logical "0".

on1aag.
 
Last edited:
I think u never use Circuit Maker....on1aag

In circuit maker when add a Resistor or capacitor or transistor, simulator does not simulate resistor in digital logic Simulation...
 
Hi,

I don't know whether to call you hardcore, or misery. Both seem to apply vis a` vis your problem.

Since you are trying to adapt from my circuit originally offered in the fifth posting to this thread, I thought it might be helpful to compare the two. They are side by side in the attachment.

I have simplified mine some, although it is basically the same working circuit (not sim) I built shortly before Christmas for a "race the clock" party game.

The '192 has a feature most counters do not: it allows you to tell it where to start counting. As an example, if you want to start at "2" and count up, you place the binary number "2" (0010) in P0 - P3 via the switches. That is the sole purpose of those inputs.... you do not need them for your project, so they may all be grounded. (Binary 0 (0000)).

I have added a switch for up-down counting. Please note that if you are counting down, TCD must be connected to gate IC2a. Just the opposite (as shown) if you are counting up.

The circuit, if you follow these changes, will work. For real. Added: I did not check the display driver and 7 segment. I guess they are okay. Ayne's schematic is right.
 

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  • u-d counter revisit.JPG
    u-d counter revisit.JPG
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