Circuit assistance, pleeeeze.

Discussion in 'The Projects Forum' started by matslapper, Mar 4, 2008.

  1. matslapper

    Thread Starter New Member

    Feb 25, 2008
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    0
    Can I modify the roulette wheel circuit to variably select 14 or 18 LEDs? I have successfully built a 10 LED randon selection curcuit using the 4093 and 4017 ICs but I am not sure with the 10 output pins of the IC that I can use this circuit. Thanks in advance.
     
  2. mrmeval

    Distinguished Member

    Jun 30, 2006
    833
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  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Unfortunately, the 4020 does not output Q1 nor Q2.

    One can get 17 discrete states by cascading two 4017's using an AND gate (or two NANDS in series) - but for 18 states, it will require yet another gate and more logic.
     
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