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555 to 4049

Discussion in 'General Electronics Discussion' started by Kstarloomo, Dec 24, 2012.

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  1. Kstarloomo


    Jun 28, 2012
    I'm sendin signals from 555 to 4049 but it function well for three input but failed for four to six input. Wat do I do ? Here is d circuit. Then if I"m to send it to two 4049 hw do I go about it? I used 10'k to pull it down n 1.2k for the current led. 470 each from the 555 to each 4049.

    Attached Files:

  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    You're shorting pin 9 to ground which will be a bad thing.

    In fact all the resistors to ground from the inputs of the 4049 inverters can be removed. (if you must, you can leave 1)
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