Can anyone tell me what this cable assy is for?

Discussion in 'General Electronics Chat' started by IT_Guru, Jan 8, 2009.

  1. IT_Guru

    Thread Starter Member

    Nov 20, 2008
    17
    0
    I picked up an 8' 2.5mil plug to 9-pin (Serial) connector cable assy hoping to add the necessary diodes and resistors to use it to connect my TI-83 Graphic Calculator to my LT. For anyone else that wants these simple schems and SW - contact me

    Anyway, when I popped open the shell, I found a surprise. Soldered to the 9 serial-end pins was a small double-sided PBC populated with 3 SMD Transistors, 5 resistors and 5 diodes on one side. I'll send the macro set of pics to anyone that wants them as I could not figure out how to attach them here.

    This device looks to me like it might be 'special' - Heck... to me anything with parts soldered on is 'special'.. so I'd rather not trash it. I'll get another cable assy to modify, but in the meantime I'd really like to know what this is and does.


    Any help or insight appreciated.
     
  2. IT_Guru

    Thread Starter Member

    Nov 20, 2008
    17
    0
    I forgot to mention the PCB is stamped PCB1228403B
    Thx again
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,641
    2,344
    Hello,

    It can be that the parts are used to convert the logic levels to RS232 levels.

    Greetings,
    Bertus
     
  4. Alberto

    Active Member

    Nov 7, 2008
    169
    36
    Very likely is a level translator.
    What is hard to say is : a (3.3V to RS232 translator) or a (TTL to RS232 translator) ?

    Alberto
     
  5. IT_Guru

    Thread Starter Member

    Nov 20, 2008
    17
    0
    Thanks guys... I'd post jpeg if I knew how. For now, it'll just sit in my 'Honey DO' box and I'll press on with the new box-stock-normal cable I got for the TI83.
     
Loading...