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Need to generate sequence 001, 010, 100, 001, 010, 100, ...

Discussion in 'Electronic Basics' started by [email protected], Apr 28, 2008.

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  1. Guest

    I am looking for the simplest collection of logic chips that would
    produce the sequence 001, 010, 100, 001, 010, 100, ...

    I know that a PIC could be programemd to do this.

    Any help would be greatly appreciated. Thanks
     
  2. Eeyore

    Eeyore Guest

    Yes a PIC.

    Graham
     
  3. James Beck

    James Beck Guest

    Yep, one of the little 8 pin jobs could do it with no external parts,
    short of a decoupling cap.
     
  4. JeffM

    JeffM Guest

    [email protected] bsu.edu wrote
    What grade do you expect you'll get
    from his instructor at Ball State University?
     
  5. Varactor

    Varactor Guest

    A simple shift register and the output changes with the clock input.
    How you clock it is up to you. The last bit is wired back to the first
    data in...

    Cheers
     
  6. Rich Grise

    Rich Grise Guest

    You're not allowed to say "use a pic" without providing a schematic
    and full code listing.

    My first thought was a 3-bit shift register.

    Cheers!
    Rich
     
  7. Eeyore

    Eeyore Guest

    OK, use an '8051' then. 63 cents indicative price for this one. I don't
    do PIC code but I could ask my nephew to do that !.
    http://www.nxp.com/pip/P89LPC901_902_903-05.html

    Far too many parts !

    Graham
     
  8. Eeyore

    Eeyore Guest

    Oh, OK. A counter with auto-reset is the answer then.

    Graham
     
  9. James Beck

    James Beck Guest

    A PIC isn't a logic chip?
    It might not be a "discrete" logic chip, but I'm pretty sure there is
    some kinda' logic in there. :)
     
  10. James Beck

    James Beck Guest

    The OP stated :
    "I know that a PIC could be programemd to do this."
    Is that a rejection?

    Naturally, the info provided doesn't really give us the full domain of
    the problem, and I'm just yanking your chain.......

    Jim
     
  11. Eeyore

    Eeyore Guest

    You still need a clock source of course. The 89LPC901 can do the lot.

    Graham
     
  12. Jamie

    Jamie Guest

    Yes, that sounds logical!


    --
    "I'd rather have a bottle in front of me than a frontal lobotomy"

    "Daily Thought:

    SOME PEOPLE ARE LIKE SLINKIES. NOT REALLY GOOD FOR ANYTHING BUT
    THEY BRING A SMILE TO YOUR FACE WHEN PUSHED DOWN THE STAIRS.
    http://webpages.charter.net/jamie_5"
     
  13. Clint Sharp

    Clint Sharp Guest

    Spot on, clock source? Personally if I was using a 4017 I'd have to use
    a 555 but that's because they were the very first chips I bought as
    separate components and I'm a sentimental git. (I saved for months for a
    Radio Shack 200 in 1 electronics lab which had a couple of TTL chips
    before I discovered the delights of solder and stripboard at the tender
    age of 12)
     
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