how to output tm 08 on cro screen

Discussion in 'Homework Help' started by Varsha, Dec 11, 2008.

  1. Varsha

    Thread Starter Member

    Nov 17, 2008
    14
    0
    how to output tm o8 on cro screen using microntroller?
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,645
    2,344
    Hello,

    Do you mean an oscilloscope with cro?
    Then you can use the XY mode.
    You have an X position, Y position and Z for the intensity.

    Greetings,
    Bertus
     
  3. Varsha

    Thread Starter Member

    Nov 17, 2008
    14
    0
    yup.. a cro screen which we use in labs to observe signals frm electronic circuits...sit how to output this particular sequence?? TM 08..how can you do it..you have to interface microcontroller with dac??
     
  4. bertus

    Administrator

    Apr 5, 2008
    15,645
    2,344
    Hello,

    You have to store the text in "dot matrix" inside the memory of the micro.
    Then you have to make two loop-counters, one for X and one for Y position.
    The values of the counters must be put on a port of the micro.
    On each port of the micro there must be a DAC, the outputs from the DAC's go to the X and Y of the cro.
    The text must be read in an registre line for line.
    Each line must be shifted out at the same time of the counters.
    This output is you Z signal, the brightnes control of the cro (most times a connection on the back of the cro).

    Greetings,
    Bertus

    PS I am not yet working with microcontrollers.
    I have made this kind of things 30 years ago with TTL counters and a ramchip.
     
    Last edited: Dec 12, 2008
  5. Papabravo

    Expert

    Feb 24, 2006
    10,136
    1,786
    I thought dots were used when the display has a raster scan. With an XY display like the DEC 338 you use vectors to make the characters. Vectors also work on engraving tables.
     
  6. leftyretro

    Active Member

    Nov 25, 2008
    394
    2
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