Help with Project to Implement Start/Stop Timer

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SUMMARY

The discussion centers on implementing a start/stop timer using a 555 timer configured for one-second intervals. The output will be displayed on three seven-segment displays, with the user, Satya, seeking guidance on the integration of components without using a microcontroller. Key components mentioned include BCD counters (e.g., 4510) and seven-segment decoders (e.g., 4511). The concept of utilizing a flip-flop for the start/stop functionality is also highlighted as a crucial element in the design.

PREREQUISITES
  • Understanding of 555 timer configuration for timing applications
  • Knowledge of BCD counters, specifically the 4510 model
  • Familiarity with seven-segment display decoders, such as the 4511
  • Basic electronics concepts, including flip-flops for control logic
NEXT STEPS
  • Research the configuration and operation of the 555 timer for precise timing applications
  • Learn about cascading BCD counters and their integration with seven-segment displays
  • Study the functionality and implementation of flip-flops in electronic circuits
  • Explore practical examples of timer circuits using 555 timers and BCD counters
USEFUL FOR

Electronics enthusiasts, hobbyists building timer circuits, and students learning about timer applications and digital display integration.

Physicslearner500039
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Hi All,

I am doing this project where I want to implement a start stop timer. I want to use one start and one stop button (or a single button for both) and interface them with 555 timer. The 555 timer I would like to configure for one second. The output I would like to display on the 3 seven segment displays (up to 3 digits 0,1,...999 etc). So, once I press the start button the 555 timer will start counting the seconds and display the same as 1,2 etc upto 999 on the seven segment displays, andd stop once the stop button is pressed and hold the value. Could somebody please guide me how to do this? I don't want to use microcontroller. I know how to configure the 555 timer for 1 sec but remaining part is little bit confusing for me.

Thanks in advance,
Regards,
Satya
 
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Pipe the pulsed output into cascade of three BCD Counters (eg 4510) and the output of the BCD Counters to the three 7-seg displays via 7-seg decoders (eg 4511)

As for the start/stop - the hint word to search for is 'flip flop'
 

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