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

  PRO116
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In this project you will get experience with using seven segment LED display and Counter and display decoder. The project uses a single common cathode 7 segment display that will display the count up to 9. The IC used for counting is IC 4026 which also comes with display driver. The IC counts the pulses and converts that to a decimal number up to 9 and supplies power to the appropriate segments of the display to show the current count. when the count reaches 9 it will be reset back to zero and continues again.

Pulses used for counting can be manually supplied by touching the +ve and -ve terminals or can be fed from any other source. In this project we use a 555 timer to feed the pulses. See project (click here) for another simple project where 555 is used.

Below is the circuit used to build the counter.


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

Link to You Tube Tutorial



List of parts used in the project
Ref Part type Part Name Value Count Info
 7 Seg1DISPLAYSeven Segment Display 14 mm--1 See Picture
 Bat1BATTERYPACKBattery Pack 6V AA--1 See Picture
 C1ELECCAPACITORElectrolytic Capacitor 10uF10uF1 See Picture
 IC1ICIC NE555NE5551 See Picture
 IC2ICIC 40264026IC1 See Picture
 R1RESISTORResistor 10K10K1 See Picture
 R2POTPot Meter 100K100K1 See Picture


Approximate cost for building this project is Rs 121.00


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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