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Digital Stopwatch Circuit diagram and working

Segments: 

  • IC 4033 - 2 
  • 555 clock IC - 1 
  • Cathode 7 Segment Display 
  • 150 Ohm - 1 
  • 100K resistor - 1 
  • 33K resistor - 1 
  • 56K resistor - 1 
  • 10uF capacitor - 1 
  • On/off switch - 1 
  • Push button - 1 
  • Bread board - 1 
  • 9 Volt Battery - 1 
  • Battery Connector - 1 
  • LED - 1 
  • Voltage Regulator 7805 - 1 
  • Connecting wires 
IC CD4033: 

This is counter and seven portion disentangling in one bundle IC which is anything but difficult to interface with seven section shows. This is completely static counter operational IC and perfect for low force shows. This IC can be utilized for decade tallying seven fragment decimal showcases, recurrence division seven section decimal presentations, timekeepers, watches, clocks, counter/show driver for meter applications.
 

Advanced Stopwatch Circuit Diagram and Explanation:

In this circuit we have utilized a 555 clock IC based astable multi-vibrator which is for making 1 second postponement. What's more, two normal cathode seven portion decoder IC's in particular CD4033. The yield of astable multivibrator is straightforwardly applied to seven section decoder IC's (U4) Clock pin (1) and convey yield pin(5) of U4 IC is legitimately associated with clock pin (1) of second seven portion decoder(U3). What's more, two seven section are associated with these decoder (U3 and U4). Its associations are appeared in stopwatch circuit graph given underneath. One press button is utilized to stop/start the stopwatch and one press button is utilized to reset the stopwatch. A 5 volt voltage controller is utilized for giving 5 volt to entire circuit. What's more, a 9 volt battery is utilized for controlling the circuit. Rest of associations are appeared in the circuit outline. 


Working: 

In this  online stopwatch circuit we have produced one second deferral by utilizing 555 clock based a stable multivibrator. By utilizing some estimation we can without much of a stretch creates one second deferral. In a stable multivibrator there is two resisters and one capacitor is answerable for delay by charging or releasing capacitor through resistors. Estimation recipe for creating delay for a stable multivibrator is given beneath. 

F=1/T= 1.44/(R1 + 2R2) C1 

In this undertaking we have chooses R1 is 33K, R2 is 56K and C1 is 10uF. [Also check: brief clock circuit] 


Ass Astable multi-vibrator creates one seconds delay, this deferral is motions or beat of 0 and 1. So we will utilize this heartbeat for setting off the seven fragment decoder then seven section decoder changes the digit number with the one moment of timeframe. 

At the point when we ON the stopwatch (by start/stop button) it begin checking from zero and in the event that we killed a similar catch, at that point tallying is stop or interruption until again turned ON a similar catch or press reset button. 

There are two seven sections, so this stopwatch circuit can check 00-99 seconds time.
 Click  stopwatch360  to use online stopwatch.

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Location: United States

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