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A ttl level delay question :-)

Discussion in 'Electronic Basics' started by rgb, Oct 27, 2003.

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  1. rgb

    rgb Guest

    Hi,

    I need to have some ttl level delay (i'm using 74LS type of components).
    Something around 1msec.

    So I guess a RC with 1k and 1microF should be ok ...

    --- R -------- Smith Inverser ---
    C
    |
    --------------


    But wait a sec, (I try to understand in my old ttl databook what is
    really a simple gate (transistors and all that stuf ... )

    I guess I should use something more like

    inverser ---- R --------- R -------- Smith Inverser
    C
    |
    ------------------------------------------

    cause gate can also sink current ...
    The front inverser serve as buffer front other gates...


    Am I right ? Is that the way to do delay like 1ms ?

    :)
     
  2. Lord Garth

    Lord Garth Guest

    I never heard of an "inverser"...what part number is that?
     
  3. Jim Large

    Jim Large Guest

    Just look up the regular TTL part number and
    write it backward.

    -- Jim L.
     
  4. He probably ment an schmith trigger with inverted output. 7414 is the
    number.
     
  5. Lord Garth

    Lord Garth Guest

    I was simply pointing out his made up part name. I actually do know
    what he meant. Its a way to make them remember.

    I recall a magazine article where the author stated, "...the voltage
    through the circuit...". That one needed some basic info as well.
     
  6. rgb

    rgb Guest

    You're surely reflecting "the way" all people should help people !
    Thanks for blasting of people ! We need guy like you !!!

    This remind me to blast english people who are not fluent in french :)

    BTW I also repost a corrected version and some people find quiet
    acceptable to give some constructif comments.

    Thanks, not everybody are like you :)
     
  7. Lord Garth

    Lord Garth Guest


    It was tongue in cheek, a jest and I think he understood. However,
    feel free to prod me when I make mistakes...it's okay.
     
  8. Just stand back, and be ready to dive under your desk when you do!
    Oh, you meant that it is ok poke you with a finger, not the cattle
    prod? Sorry! ;-)
     
  9. Lord Garth

    Lord Garth Guest

    No problem, my bomb shelter is ready!
    :)

    Cattle prod !!! Yikes!
     
  10. Fred Abse

    Fred Abse Guest

    Judging by what most English people I know say, that is what most French
    people do, on their own home ground.
     
  11. Lord Garth

    Lord Garth Guest

    Fortunately, I'm not English. Now my Grandpa was....
    Also, I wouldn't attempt to speak French. Spanish is
    more useful here.
     
  12. That hole under your work bench isn't a bomb shelter. I hate to tell
    you this, but the management lied, again. :(
     
  13. Lord Garth

    Lord Garth Guest

    As has been pointed out by others signature...
    "And then there is duct tape!"
     
  14. And if you manage to hold your boss down and wrap him in it, how long
    will you keep your job? ;-)
     
  15. Lord Garth

    Lord Garth Guest


    Umm, oh yeah, remove the tp from the stall and he'll be trapped there.
    That's
    the ticket!
     
  16. Even better, catch him napping at his desk, and drywall over the
    doorway.
     
  17. Lord Garth

    Lord Garth Guest

    We used packaging tape all across the dorm door jam...in the early A.M. when
    the victim got up to go, they'd walk right into it.
     
  18. How about crazy glue under their shoes, so when they run for the door
    a quitting time, they have to do it barefoot? ;-)
     
  19. Lord Garth

    Lord Garth Guest

    Well, the boss did stand in a xylene spill, with his rubber soled shoes, a
    little too long. When he tried to leave, one shoe stayed and the other
    got its sole thined out as about 20% was still on the floor.
     
  20. How hard was it to get him to step into the xylene?
     
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