# Can someone out there help me out with this !!

Discussion in 'General Electronics Chat' started by Silentknife, Nov 15, 2013.

1. ### Silentknife Thread Starter New Member

Nov 15, 2013
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0
This is my question:-

Using the 74LS163 4-bit counter and minimum extra logic, design a digital circuit that repeat the counting sequence 4,5, 6, 7, 8, 9, 10, 11, 12 either three times or seven times depending on the external selection input X, such that:
When X = 1 the counter counts from 4 to 12 three times.
When X = 0 the counter counts from 4 to 12 seven times.
The circuit has a RESET input which last for one clock pulse and a HOLD input. When RESET = 1, the counter restart the count as explained above; and when HOLD = 1, the counter halts and it resumes counting when HOLD is set back to 0.

its very important please please reply me ASAP

2. ### tshuck Well-Known Member

Oct 18, 2012
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675
So, when is your homework due?

We do not do your homework for you, instead, once you've shown your work, we will help guide you in the right direction - without that effort, there is nothing to go on...

3. ### t06afre AAC Fanatic!

May 11, 2009
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Well what part of this are you struggling with. Is it like my project is soon to be due. And I has done nothing yet besides panicking? As a start try to create the counter from 4 to 11

DerStrom8 likes this.
4. ### Silentknife Thread Starter New Member

Nov 15, 2013
5
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@tshuck nah actually i have started this problem
hmm i will try uploading a pic of the cct

t06afre actually m facing problem with HOLD only thats it...

5. ### t06afre AAC Fanatic!

May 11, 2009
5,939
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For the hold function just use a AND gate, with an inverter on the input for the hold signal. And tie the clock to the other input. Then the hold signal is 0. You will have the output following the input. But as long as the hold input is 1. The AND output will always be zero. More simple may it be if your flip-flops have some sort of enable input. This signal is often active low
Edit: I see now that you use the 74ls163 counter. Take a look at the datasheet on how to use the PE CET CEP pins

Last edited: Nov 16, 2013
6. ### Silentknife Thread Starter New Member

Nov 15, 2013
5
0
well i tried what u said and now m totally blank :/ what to do next
i have attached the cct picture in my next comment

7. ### Silentknife Thread Starter New Member

Nov 15, 2013
5
0
please find me cct diagram

May 11, 2009
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9. ### logic01 New Member

Nov 17, 2013
2
0
I think you have mistake in your design the load and clear must be connect to something but really I dont no it
because I have checked it up but there was no answer

Can you put the program maybe I can help you cause I have mistake in may connection

Last edited by a moderator: Nov 18, 2013
10. ### Silentknife Thread Starter New Member

Nov 15, 2013
5
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I am unable to upload the file it says error coz it is .cct file :/ what can i do

11. ### bertus Administrator

Apr 5, 2008
15,799
2,385
Hello,

If you want to upload other formats than the given ones, you could zip the file or add .txt to the name and attach it.

Bertus

12. ### logic01 New Member

Nov 17, 2013
2
0
change the file name instead of cct put txt for example