Hyestresis problem

Discussion in 'General Electronics Chat' started by TAKYMOUNIR, Nov 28, 2012.

  1. TAKYMOUNIR

    Thread Starter Active Member

    Jun 23, 2008
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    Last edited: Nov 30, 2012
  2. WBahn

    Moderator

    Mar 31, 2012
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    Could you PLEASE, for ONCE, at least TRY to answer your own question and show SOME work, instead of expecting people here to be your no-effort-required-on-your-part answering service?
     
  3. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Well the voltage on pin 2 is 40 volts at 40Kv, and 2Volts at 2Kv, with the values of R4 & R5, so it will be 10Volts at 10Kv.

    So it wont work!
     
    Last edited: Nov 29, 2012
  4. TAKYMOUNIR

    Thread Starter Active Member

    Jun 23, 2008
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    Hi in this circuit i need my hestresis between 6 V and 1 so when vin is more than 6 v the vout will be low and when vin decrease and reach 1V vout will be high
    so i did the calculation as following
    i let R3=10K ohm
    AND WHEN VIN REACH 6V I WILL HAVE
    4v/R2+(15-6)v/R1=6v/10K ohm
    AND WHEN VIN REACH ZERO
    9v/R2-1v/R1=1v/10K ohm
    AND I SOLVE THESE 2 EQUATION FOR GETTING R1 AND R2
    MY QUESTION IS THIS TRUE AND IF I NEED MY HYSTRESIS FROM 6 VT 0V WHAT THE SECOND EQUATION WILL BE
     
    Last edited: Dec 1, 2012
  5. WBahn

    Moderator

    Mar 31, 2012
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    Thank you for finally showing some work! (Next perhaps you can work on using a meaningful thread title).

    You equations look good, other than you obviously don't believe in tracking your units, which I harped about more than once. If you want any assistance from me in the future, you better use your units.

    Without a negative supply someplace, you can't get a threshold of 0V. Even if you could, you could have problems getting enough overdrive to ensure that it transitions.
     
    TAKYMOUNIR likes this.
  6. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    I have merged the threads, to keep the things together.

    Bertus
     
    TAKYMOUNIR likes this.
  7. TAKYMOUNIR

    Thread Starter Active Member

    Jun 23, 2008
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    is my calculations is true
     
  8. spinnaker

    AAC Fanatic!

    Oct 29, 2009
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    I think Wbahn wants you to rewrite it to, include units, to make the formula more readable. You need to do a better job at helping others to help you including providing as much information as possible and stop creating multiple threads on the same subject.

    But these are common sense things that are common on almost any forum. They shouldn't need to be mentioned by other forum members, you should already know this.
     
    TAKYMOUNIR likes this.
  9. TAKYMOUNIR

    Thread Starter Active Member

    Jun 23, 2008
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    i write the units
     
  10. WBahn

    Moderator

    Mar 31, 2012
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    As I said, the equations looked good, other than the units.

    What steps, if any, have you taken to check your own work?
     
    TAKYMOUNIR likes this.
  11. takao21203

    Distinguished Member

    Apr 28, 2012
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    Hi takimon,

    I hope your C stuf woks out.
     
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