# 7493 as a "divide-by-10 counter"

Discussion in 'Homework Help' started by student_technician, Mar 22, 2015.

1. ### student_technician Thread Starter New Member

Dec 28, 2014
18
0
Hello,

A lab question I am doing is asking to show how a 7493 binary counter can be used as a "divide-by 10 counter."

So I understand that CP0 can be used as an input for dividing by two ad CP1 can be used for divide by 8.

Furthermore, CP1 can be tied to the LSB output to get divide by 16....

I cant seem to wrap my head around getting divide by 10, and Data sheet didn't help me.....

Thanks,

EDIT:

This will be a mod 10 counter so the 7493 should be reset at binary 9 count. to do this would "ANDing" the LSB and MSB together and then connecting to both master reset inputs work?

Last edited: Mar 22, 2015
2. ### djsfantasi AAC Fanatic!

Apr 11, 2010
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Can you use external gates?

3. ### djsfantasi AAC Fanatic!

Apr 11, 2010
3,486
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I think the answer is in the datasheet...

4. ### student_technician Thread Starter New Member

Dec 28, 2014
18
0
The question doesn't specify if external gates can be used....

I will give the data sheet another look

Dec 28, 2014
18
0
6. ### djsfantasi AAC Fanatic!

Apr 11, 2010
3,486
1,244
My mistake. Sometimes I think I see Hung's that aren't there

7. ### absf Senior Member

Dec 29, 2010
1,654
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Can't you make use of RO(1) and Ro(2) to reset the counter to zero when it reaches '1010'?

I'll try it out on my sim.

Allen

8. ### MrCarlos Active Member

Jan 2, 2010
400
135
Yes, of course, for the 74LS93 count of 0-9, reset to 0 when the count reaches 10 (Dec), A (HEX), 1010 (Bin).

So you have to reset to zero when you get to the account you want (MOD) +1.

with a 2-input AND gate can accomplish that.

absf likes this.