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Digital Pulse Counter - Two Digit - Using Seven Segment LED, IC 4026 and Timer 555

  PRO117
.
This project is an extension of Digital Pulse Counter - Single Digit. There are two 7 segment displays and IC 4026 used here to count up to 99. The 5th pin of 4026 gives out a pulse when it moves from 9 to 0. The pulse from the one's place fed to the ten's place 4026 to move to the next digit as one's place digit moves to 0 from 9. Note the connection from pin 5 of second IC to pin 1 of first IC

Once you have done the single digit project and get it working doing this project is a piece of cake.

Below is the circuit used to build the counter.


The below photos give the assembly of the counter on breadboard.

Demo



List of parts used in the project
Ref Part type Part Name Value Count Info
 7 Seg1,7 Seg2DISPLAYSeven Segment Display 14 mm--2 See Picture
 Bat1BATTERYPACKBattery Pack 6V AA--1 See Picture
 C1ELECCAPACITORElectrolytic Capacitor 10uF10uF1 See Picture
 IC1ICIC NE555NE5551 See Picture
 IC2,IC3ICIC 40264026IC2 See Picture
 R1RESISTORResistor 10K10K1 See Picture
 R2POTPot Meter 100K100K1 See Picture


Approximate cost for building this project is Rs 181.00


Note: In addition to the above components you may also require a breadboard and power supply / batteries for building this project.


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Posts from the Users
Posted by: John Bautista
Date: 2013-08-02 14:34:10
Type: Comment
can i use IC4511 for substitute? i can't fins IC4026
Posted by: Vvv Fff
Date: 2013-01-23 17:31:46
Type: Comment
You project schematic in the 7 segment pin (A and B) is reverse
Posted by: Vvv Fff
Date: 2013-01-16 17:50:15
Type: Comment
I was made 4 digits
Posted by: Bilal Saeed
Date: 2012-12-15 11:09:16
Type: Comment
i want to buy these project for my presentation plz contact me on my id jaldi plzzzzzzzzzzzzzz
Posted by: Dalowar Sujon
Date: 2012-12-08 23:52:11
Type: Question
please tell details application of this project(digital pulse counter). i have made this project but don't understand application of this project. thanks
Posted by: Prodip Mandal
Date: 2012-11-12 10:07:56
Type: Comment
i have made this circuit for manual perpous ,i did not used 555 and 10 k for ic 4026 and 1 k for display,all light glows but no counting please can you tell me why.
Posted by: Shivu Patel
Date: 2012-10-16 22:50:13
Type: Comment
plz tel me working of this project
Posted by: Shivu Patel
Date: 2012-10-16 22:49:26
Type: Comment
plz tel me application of this project
Posted by: Sandeep Sharma
Date: 2012-09-29 15:13:21
Type: Report Misuse
plzzz explain the working and send fully file in this topic
Posted by: Sandeep Sharma
Date: 2012-09-29 15:12:36
Type: Report Misuse
plzzz explain the working
Posted by: Sandeep Sharma
Date: 2012-09-29 15:12:29
Type: Report Misuse
plzzz explain the working
Posted by: Gowthami B.m
Date: 2012-09-23 13:54:46
Type: Question
what ise application of this project?
Posted by: Sheetal Chaudhari
Date: 2012-08-21 20:42:01
Type: Comment
i want all information about this project to make this as mini project in TE EXTC
Posted by: Sahib Rehman
Date: 2011-12-08 10:57:49
Type: Comment
sir i canot find 4026 ic what its dual ic and please detail of working about ic ?
Posted by: Efkids Moderator
Date: 2011-12-01 10:08:25
Type: Comment
please check single digit counter at the below link http://www.elektroniksforkids.com/projects/view/PRO116/Digital-Pulse-Counter-Single-Digit.php
Posted by: Sahib Rehman
Date: 2011-12-01 09:26:04
Type: Comment
plz tell detail about working two digit counter?
Posted by: Ronny Roizin
Date: 2011-11-22 01:14:42
Type: Question
and i would need it to be possible to program to a certain number and then restart once it reaches that number
Posted by: Ronny Roizin
Date: 2011-11-22 01:13:46
Type: Question
If i would pay somebody can they build two of these for me? except i need the layout to be vertical instead of how it is now horizontal. And if possible to be made on a smaller board. please contact me at 9174430883
Posted by: Chandra Sekhar
Date: 2011-09-21 20:26:06
Type: Comment
plz tell me the what is the application of digital pulse counter
Posted by: Michelle Balajadia
Date: 2011-08-11 15:34:04
Type: Question
how to make the project a presetable 99-00 timer?
Posted by: William Parolan
Date: 2011-08-07 12:17:04
Type: Question
Is 4026 a combination of 74190 and 7447?
Posted by: C B
Date: 2011-08-07 04:25:02
Type: Question
What if I wanted the counter to reset after 12? So that it would count 1-12.
Posted by: Sai Praveen
Date: 2011-07-25 20:04:42
Type: Question
What is the uses of digital pulse counter two digit
Posted by: Anonymous
Date: 2011-03-15 11:52:57
Type: Question
How we build this project using pcb & plz give us pcb layout of this project
Posted by: Anonymous
Date: 2011-03-13 07:54:16
Type: Comment
You can use any 4026 series for you hobby pupose (if you are desiging a product you may want to look at the datasheets) the prefixes indicates which the manufacturer. suffixes indicates some variations. We are using CD4026B for this project.
Posted by: Anonymous
Date: 2011-03-12 14:00:57
Type: Comment
As i've seen in your image posted above, isn't it 74LS193 is also IC 4026 ? or they are different?
Posted by: Anonymous
Date: 2011-03-12 13:56:03
Type: Comment
can you provide me the number printed in the IC? Sellers asks me what number of 4026 do i need. They have a lot of different 4026 ICs with different prefixes. thank you :))
Posted by: Anonymous
Date: 2011-03-06 08:20:29
Type: Comment
Instead of 555 which generates the pulses you can use a push on switch. Please make sure the switch is debounced to avoid skipping numbers see http://ehifkids.blogspot.com/ article on debouncing.
Posted by: Anonymous
Date: 2011-03-06 06:10:22
Type: Comment
how can i make this project manually triggered and increments by one? thank you !
Posted by: Anonymous
Date: 2011-02-22 06:33:44
Type: Comment
Sorry do not know where you can get it in Philippines. But did you try other alternatives given in the comments below . like 74 192 and 4511
Posted by: Anonymous
Date: 2011-02-21 12:07:08
Type: Comment
thankyou.., it will help alot in my subject.., but where can i buy ic 4026? i can't find it here in the Philippines
Posted by: Anonymous
Date: 2010-10-22 07:33:35
Type: Comment
Yes you can use 74192. you may need a seperate LED driver like 4511 also along with 74192
Posted by: Anonymous
Date: 2010-10-19 19:21:16
Type: Question
can we use ic 74ls192? in up down circuit? 0-9 and 9-0 tnx
Posted by: Anonymous
Date: 2010-10-16 18:59:03
Type: Comment
Thank you very much for sharing us these infos. I finally made my project ^_^ Please let me know if you will post new projects here. Nice job kids! ♥cherry♥
Posted by: Anonymous
Date: 2010-10-12 10:08:47
Type: Comment
nice one to leran abt electroincs
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