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