Mod 16 syncronous counter

Discussion in 'Homework Help' started by NOSI, Oct 21, 2009.

  1. NOSI

    Thread Starter New Member

    Oct 19, 2009
    1
    0
    Hello to all,

    I am designing a Mod 16 SYNCHRONOUS counter using 2 x 74LS163 & using 2 x 74LS47 driver & 2 x 7 segment display. My counter is to count from 0 - 15, & my current status is that 2 x 74LS163 syncronous counter is connected to the 7447 driver which is than connected to the segment display so that it will display the decimal output. A two input NAND gate is connected at the 2nd 74LS163 outputs respectively D & A (1001) and its output (NAND) is connected to CLR or reset. Similarly a two input AND gate is connected at the same outputs, however its output is connected to the CLR or reset of 1st 74LS163.The response that I am currently getting is as follows:
    01 - 02 - 03 - 04 - 05 - 06 - 07 - 08 - 09 - 10 - 01 in this sequence

    my reset is at 01 & how do i count up to 15 and reset again.........

    I am stuck so can anyone carry me further from where i am @...??

    much thanks
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    From your description, the AND gate is causing the count to reset at 10. Remove it and the '163 should count up to 15.
     
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