Help Looking for a Chip

Discussion in 'General Electronics Chat' started by sungchoiok, Apr 29, 2011.

  1. sungchoiok

    Thread Starter New Member

    Apr 23, 2011
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    all I have been able to find was the ripple counter, which adds binary according to clocks signals.

    Is there a chip or a circuit design that does this?
    [​IMG]


    And what would be the name for it...?
     
  2. djsfantasi

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    Apr 11, 2010
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  3. BillB3857

    Senior Member

    Feb 28, 2009
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    If you need it to count 0, 1, 2, 3, tie output 4 back to the reset pin on the 4017
     
  4. Papabravo

    Expert

    Feb 24, 2006
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    Doesn't the animation represent a shift register with a single '1' on or am I missing something?
     
  5. Wendy

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  6. retched

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  7. t06afre

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    I think ring counter is the correct name
     
  8. Papabravo

    Expert

    Feb 24, 2006
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    Whatever the name the pattern of the animation shows the sequence:
    1-2-4-8
    and the easiest implementation is a shift register with the MSB fed back to the LSB. There should also be "RESET" logic to decode illegal states and make a transition to a legal state on the next clock, or a mechanism to load a value with a single bit on at power up.

    BTW -- a ring counter is also known as a cyclic shift register
    http://en.wikipedia.org/wiki/Ring_counter
    and the twisted-ring counter or Johnson counter feeds back the complement of the MSB
     
  9. Ron H

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    Apr 14, 2005
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    The 4017 is a 5 stage Johnson counter with the 10 unique states decoded to 10 individual outputs. As others have pointed out, it is probably the easiest way to make the counter illustrated by the OP.
     
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