+ Post New Thread
Results 1 to 7 of 7
  1. #1
    Newbie level 3
    Points: 249, Level: 2

    Join Date
    Oct 2014
    Posts
    4
    Helped
    0 / 0
    Points
    249
    Level
    2

    74LS595 Error in Simulation Proteus

    I became familiar with the 74LS595, i want to make 1 2 3 on the OUTPUT of each of three 74LS595, but it always show 0 on three 74LS595. This is my simulation and code. Help me, please!!!

    74LS595.rar

    •   Alt11th October 2014, 15:06

      advertising

        
       

  2. #2
    Banned
    Points: 12,436, Level: 26

    Join Date
    Apr 2013
    Posts
    2,528
    Helped
    538 / 538
    Points
    12,436
    Level
    26

    Re: 74LS595 Error in Simulation Proteus

    You want to display 1, 2 and 3 on 3 SSDs ? You have to clock in 24 bits of data and then give one more pulse to ST_CP store data on o/ps of 595.



    •   Alt11th October 2014, 15:25

      advertising

        
       

  3. #3
    Newbie level 3
    Points: 249, Level: 2

    Join Date
    Oct 2014
    Posts
    4
    Helped
    0 / 0
    Points
    249
    Level
    2

    Re: 74LS595 Error in Simulation Proteus

    I think, i do the same like you talk, but the simulation in proteus is not correct



    •   Alt11th October 2014, 15:32

      advertising

        
       

  4. #4
    Advanced Member level 1
    Points: 5,458, Level: 17

    Join Date
    Jul 2004
    Location
    Hungary
    Posts
    472
    Helped
    187 / 187
    Points
    5,458
    Level
    17

    Re: 74LS595 Error in Simulation Proteus

    Hi;
    Just one comment:
    Both 595 clock inputs (SHCP and STCP) require positive pulses (and working on the raising ie 0-1 edge).
    For example (to storing) your instructions should be replaced:

    IE74LS595_STCP = 1; //the raising edge
    IE74LS595_STCP = 0;

    Use the same order also for SHCP.

    Sorry but I do not have such compiler to try it.



  5. #5
    Banned
    Points: 12,436, Level: 26

    Join Date
    Apr 2013
    Posts
    2,528
    Helped
    538 / 538
    Points
    12,436
    Level
    26

    Re: 74LS595 Error in Simulation Proteus

    Do you want to drive the enable pins of SSDs using HC595 ?



  6. #6
    Newbie level 3
    Points: 249, Level: 2

    Join Date
    Oct 2014
    Posts
    4
    Helped
    0 / 0
    Points
    249
    Level
    2

    Re: 74LS595 Error in Simulation Proteus

    Quote Originally Posted by zuisti View Post
    Hi;
    Just one comment:
    Both 595 clock inputs (SHCP and STCP) require positive pulses (and working on the raising ie 0-1 edge).
    For example (to storing) your instructions should be replaced:

    IE74LS595_STCP = 1; //the raising edge
    IE74LS595_STCP = 0;

    Use the same order also for SHCP.

    Sorry but I do not have such compiler to try it.
    I also use the same as SHCP but it does not run



    •   Alt12th October 2014, 10:05

      advertising

        
       

  7. #7
    Banned
    Points: 1,459, Level: 8

    Join Date
    Aug 2008
    Location
    india
    Posts
    53
    Helped
    10 / 10
    Points
    1,459
    Level
    8

    Re: 74LS595 Error in Simulation Proteus

    Try this i make some change in your code i think this helps you



--[[ ]]--