4026 cascaded counter

Thread Starter

Rishabh Kiran

Joined Jan 29, 2024
3
Hi everyone, i have a 3 digit counter made with cascaded 4026 counter ics, the use case for this counter means that i need to be able to count twice, thrice, 4 times, 6 times with the single press of different switches. Is anyone able to provide insight as to how i could get 2, 3, 4 , 6 pulses to the clock from just one switch press, thanks in advance.
 

ElectricSpidey

Joined Dec 2, 2017
2,786
It's hard to figure out what you want.

You want to use 4 switches...correct?

Did you want the display to count to 999 n number of times?

Do you want to change the frequency of the clock?

Do you want to divide the clock?
 

Thread Starter

Rishabh Kiran

Joined Jan 29, 2024
3
HI Everyone, thanks so much for the replies. I dont have a schematic for my exact circuit, ive just been using the below, but adjusted for 3 4026s.
Welcome to AAC!
Post a schematic so we know what we're working with.
Is this schoolwork?
Yes this is school work. im doing a gcse in electronics with WJEC and as part of this 20 percent of my final grade is a NEA (non exam assesment) basically like a breadboard project on a problem you need to solve. My project is basically a cricket scoreboard and in cricket you can score 1, 2, 3, 4 or 6 runs in one ball. so i wanted one of my subsytems to be an input subsytem where it allows you to add 2, 3, 4 or 6 to the count with different button presses.
It's hard to figure out what you want.

You want to use 4 switches...correct?

Did you want the display to count to 999 n number of times?

Do you want to change the frequency of the clock?

Do you want to divide the clock?
No i dont want to divide the clock, i want 5 seperate switches, each adding either 1, 2, 3, 4 or 6 respectively.
Do you want all those pulses occurring at the same time after one switch press?
If so, you could use four CD4017 counters and a few gates.
Could you explain how if you dont mind?

Thanks again everyone for the replies
 

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crutschow

Joined Mar 14, 2008
34,470
Could you explain how if you dont mind?
The CD4017 is a decade counter with 10 sequential outputs so, you can connect the desired output to turn a 555 astable clock on and off at the desired number of counts.

You could either use six counters or, to possibly reduce part count, one counter with the push-button selecting which output controls the 555.

Since this is homework, I can help you with that if you have questions about the circuit, but can't design it for you.
Connecting a push-button to start the sequence is fairly straight-forward.
 
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Thread Starter

Rishabh Kiran

Joined Jan 29, 2024
3
The CD4017 is a decade counter with 10 sequential outputs so, you can connect the desired output to turn a 555 astable clock on and off at the desired number of counts.

You could either use six counters or, to possibly reduce part count, one counter with the push-button selecting which output controls the 555.

Since this is homework, I can help you with that if you have questions about the circuit, but can't design it for you.
Connecting a push-button to start the sequence is fairly straight-forward.
Ah okay.
Since this is schoolwork, we can only provide guidance.

Show your attempt at implementing the variable incrementing.
My idea was to use a 555 astable circuit with a frequency of like 1 for example. then have 4 different monostable 555 circuits with like either 1, 2, 3, 4 or 6s periods, to trigger the pulse generation of the 555 astable
 

crutschow

Joined Mar 14, 2008
34,470
My idea was to use a 555 astable circuit with a frequency of like 1 for example. then have 4 different monostable 555 circuits with like either 1, 2, 3, 4 or 6s periods, to trigger the pulse generation of the 555 astable
That could work, but would require a lot of discrete parts, and would likely require pots to tweak of the timing for the the different monostables to get the desired number of pulses.

You stated 4 monostables, but don't you need 5 since you have 5 periods?
 
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