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OScope on PC Serial Port

Discussion in 'Electronic Basics' started by Bill, Jul 18, 2004.

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  1. Bill

    Bill Guest

    I recently built an oscilloscope project that connects to a PC via a
    serial port:

    http://scopeonpc.tripod.com/

    It uses an ADC0820 ACD converter and a multiplexor and was real easy
    to put together. The owner of the web page has a demo version of
    software freely available that is limited to fixed time and voltage
    display scales.

    I have offered to pay the software author the registration fee for
    program to "unlock" the demo version and allow use of the voltage and
    time scaling functions but have not made much headway. Has anyone run
    across this project before or knows of a similar software program that
    would be able to read data from this project? Thanks in advance for
    any information the group is able to provide.

    Bill
     
  2. Bob Masta

    Bob Masta Guest

    Actually, this project uses a *parallel* port, not a serial
    port.

    I have no info on this project. However, if you just want
    an inexpensive PC scope, you might want to check out
    my Daqarta software with the LPTX driver. The ADC
    "board" can be as simple as a handful of resistors wired
    into a connector shell. (Some ports with uneven bit drive
    levels may need a '373 buffer.) The resistors are just
    an 8-bit R-2R ladder DAC, and the PC is doing all the work
    to drive it as a successive approximation ADC. So the
    top sample rate is usually around 40 kHz.

    With the Daqarta software you not only have complete access to
    sensitivity and time-base, you also have a built-in spectrum
    analyzer, spectrograms, histograms, signal averaging, etc.
    And you can use the same LPTX gadget in DAC mode with
    Daqarta to generate a huge variety of signals. (This simple
    circuit won't acquire and generate at the same time, however.)

    Hope this helps!


    Bob Masta
    dqatechATdaqartaDOTcom

    D A Q A R T A
    Data AcQuisition And Real-Time Analysis
    www.daqarta.com
     
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