Digital Stopwatch using 4026 + 555 + 7 Segment

A stopwatch is a handheld timepiece designed to measure the amount of time that elapses between its activation and deactivation.

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This is counter and seven segment decoding in one package IC (4026)which is very easy to interface with seven segment displays. This is fully static counter operational IC and ideal for low power displays. This IC can be used for decade counting seven segment decimal displays, frequency division seven segment decimal displays, clocks, watches, timers, counter/display driver for meter applications.
One push button is used to stop /start the stopwatch and one push button is used to reset the stopwatch

Digital Stopwatch with using 4026 ic , 555 timer Ic and 7-segment display.

required components are four 4026,four 7-segment display,one 555 timer ic,two 10k resistor,one 1k resistor,one female header,ic holders,one 10uF electrolyte Capacitor , 100k potentiometer and 5v regulator.

this is proper Working video of digital stopwatch

A stopwatch is a handheld timepiece designed to measure the amount of time that elapses between its activation and deactivation. A large digital version of a stopwatch designed for viewing at a distance, as in a sports stadium, is called a stopclock.

pin 1 is Clock pin, this pin connect to output of astable configuration of 555 timer ic pin 3(output).free running pulse generate by 555 timer ic

connection be like this figure

for cascading 2 or more 4026,1st 4026 pin 5 is carry,take that carry out to 2nd 4026 as Clock(pin 1).

2nd 4026 pin5 carryout connect to 3rd 4026 as clock input(pin 1)

and so on.

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  • 4 × 4026 IC 4026 IC Counter Circuit. The 4026 is a decade counter integrated circuit (IC) with decoded outputs for driving a common-cathode seven-segment LED display. An advantage of this IC is that it has decade counter functionality together with 7-segment decoder driver.
  • 1 × 555 TIMER IC Timer ic as astable
  • 1 × 9V Battery
  • 2 × 10k resistor
  • 1 × 1k resistor

View all 11 components

  • 1
    Make a Connection ON Breadboard

    first make tight and proper connection as per circuit Diagram.For check the working Of 4026 ic i make a monostable counter for testing.

  • 2
    Astable 7 segement counter

    cascade connection of 4x 4026 with 4 x 7 segment display

  • 3
    Cut the Project Box

    using Female Header as Holder of 7 segment display

View all 9 instructions

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Edvin wrote 03/29/2019 at 10:34 point

Which desginer/simulation program did you use for this circuit?

Do you know what I need to change/remove if I only want to count minutes, seconds and 1/10 of a second?

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Dan Maloney wrote 01/14/2019 at 19:33 point

Ambitious to do it from discrete logic, but those kind of projects tend to be the most instructive. I once built a stepper-motor driver from basic logic chips, just because. It covered most of two breadboards and was completely impractical, but I had a blast and learned a lot.

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Abhishek Tiwari wrote 01/15/2019 at 01:32 point

its sounds amazing,I am also a electronic hobbyists .thank you for your Priceless appreciation

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