ltspice CD4000.LIB error messages

Discussion in 'Electronics Resources' started by celtic762, Oct 18, 2013.

  1. celtic762

    Thread Starter New Member

    Jun 14, 2013
    2
    0
    I'm trying to simulate an RGB LED fader using a NE555 and CD4029 running on 9V. I've got the NE555 working in the simulation in astable mode. The problem is getting the CD4029B model to work. :confused:

    I've loaded the CD4000.lib file into the lib\sub folder
    Ive included the Spice directive .include lib\sub\cd4000.lib
    I've set value to CD4029B which is a .SUBCKT in the CD4000.lib file.

    The following warnings come up.

    WARNING: Can't resolve .param vdd1=vdd
    WARNING: Can't resolve .param speed1=speed
    WARNING: Can't resolve .param tripdt1=tripdt

    There are no .param settings for vdd, speed or tripdt set in the file. Are these values found in the manufacturer's documentation?

    Any help would be much appreciated.

    Cheers :)
     
  2. Jony130

    AAC Fanatic!

    Feb 17, 2009
    3,957
    1,097
    Try set this

    SpecLine VDD=9 SPEED=1 TRIPDT=5e-9
     
  3. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,801
    1,105
    You shouldn't need to set that value. The symbol already has a value. Just right-click on the symbol and edit the Vdd value to 9V.
     
  4. celtic762

    Thread Starter New Member

    Jun 14, 2013
    2
    0
    Thanks! :D I also had to get the pin assignments in the right order as well :rolleyes:
     
Loading...