A Low RPM Alarm Using 74HC or 4000 Series Logic. No MCU allowed.

공개 설명 게시판

• 
  콘테스트 주최자

  • 5 개월 전

  Thank you every body for your ideas. But NO ONE has provided a schematic design we can build.
  
  We have been given ideas only. Please provide a schematic with component values.

  • 5 개월 전
• 
  콘테스트 주최자

  • 5 개월 전

  We already know the job can be done. We don't need ideas and suggestions. We need a working design that we can build and test. Today we have four entries. No entry shows a working complete design!

  • 5 개월 전
  1. 

     Muzafarbaloch

     • 5 개월 전

     Sir! here you are kindly check #8 . it contains the complete working circuit design. Thanks

     • 5 개월 전
• 

  Muzafarbaloch

  • 5 개월 전

  Certainly, you can use a 74HC4040 binary counter and other basic components to create a circuit that measures the width of a TTL pulse. Sir Kindly check my entry #8 . everything is mentioned there.

  • 5 개월 전
• 

  osamaelkomy

  • 5 개월 전

  I'm confused about your requirements for this contest.!
  I gave you the design schematic and a simulation. The simulation confirmed that the design works perfectly with 74HCXX logic chips. What else do you need ?

  • 5 개월 전
  2개 메시지 더 보기
  1. 

     osamaelkomy

     • 5 개월 전

     There are other options to replace 74HC123 that can generate the 3s pulse like 74HC4538. Does using MMV acceptable ? or you prefer counter solution ?

     • 5 개월 전
  2. 

     osamaelkomy

     • 5 개월 전

     Other thing about circuit behavior, when the alarm signal is activated ( if the PW > 3s), what should happen when the PW returns to normal condition (PW < 3s)? automatically deactivate the alarm, or provide manual deactivation (Reset)?

     • 5 개월 전

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