FTDI voltage does not drop to zero

Discussion in 'General Electronics Chat' started by DuzMontana, Apr 9, 2016.

  1. DuzMontana

    Thread Starter New Member

    Mar 25, 2015
    24
    2
    Hi,

    I'm having problem with my FTDI programmer and I ended up checking it out with the oscilloscope. It appears that the voltage is not going down to 0V and is not even going to the same voltage during the pulse. (Sending AT). The pattern of lower voltage is reproducible.

    ftdi.jpg

    Nothing is plugged on the FTDI, just the scope. I had sporadic problem programming an HC-05

    Is it possible that the IC is damaged?

    Dan
     
  2. #12

    Expert

    Nov 30, 2010
    16,298
    6,808
    What is an FTDI?
    Could you post some sort of schematic?
     
  3. DuzMontana

    Thread Starter New Member

    Mar 25, 2015
    24
    2
  4. #12

    Expert

    Nov 30, 2010
    16,298
    6,808
    Oops. Not in my line of expertise.:oops:
    Next helper, please.
     
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