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Free Oscilloscope Questions

ArchiverArchiver Posts: 46,084
edited 2001-03-31 10:19 in General Discussion
One of our members posted a link for a free computer based Oscilloscope.
http://polly.phys.msu.su/~zeld/oscill.html The documentation does not
contain instructions on attaching probes. Is it safe to attach a couple of
probes to my sound card and start plugging away? Should I install resistors
between probe and line in? Thanks in advance.

Jeff

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-03-29 11:18
    Jeff
    I connect the inputs to the "line" input of my soundblaster PCI card, because
    the "mike" input is not stereo.
    If you never connect to a device that uses more than 6V, no resistor or
    protection are needed.
    Don't forget to select the line input and a suitable volume in the "recording"
    setup of your card.
    Regards
    ECO
    Original Message
    From: "Jeff Mitchell" <EL-JEFE@P...>
    To: <basicstamps@yahoogroups.com>
    Sent: jeudi 29 mars 2001 06:36
    Subject: [noparse][[/noparse]basicstamps] Free Oscilloscope Questions


    > One of our members posted a link for a free computer based Oscilloscope.
    > http://polly.phys.msu.su/~zeld/oscill.html The documentation does not
    > contain instructions on attaching probes. Is it safe to attach a couple of
    > probes to my sound card and start plugging away? Should I install resistors
    > between probe and line in? Thanks in advance.
    >
    > Jeff
  • ArchiverArchiver Posts: 46,084
    edited 2001-03-29 12:39
    Another tip I once saw was to hook up through an old receiver you may
    have laying around. Guess it depends on which you value more in case of
    accidents, the sound card or receiver.

    I'm interested in how this (or like) software performs, any opinions?

    Kevin

    ECO wrote:
    >
    > Jeff
    > I connect the inputs to the "line" input of my soundblaster PCI card, because
    the "mike" input is not stereo.
    > If you never connect to a device that uses more than 6V, no resistor or
    protection are needed.
    > Don't forget to select the line input and a suitable volume in the "recording"
    setup of your card.
    > Regards
    > ECO
    >
    Original Message
    > From: "Jeff Mitchell" <EL-JEFE@P...>
    > To: <basicstamps@yahoogroups.com>
    > Sent: jeudi 29 mars 2001 06:36
    > Subject: [noparse][[/noparse]basicstamps] Free Oscilloscope Questions
    >
    > > One of our members posted a link for a free computer based Oscilloscope.
    > > http://polly.phys.msu.su/~zeld/oscill.html The documentation does not
    > > contain instructions on attaching probes. Is it safe to attach a couple of
    > > probes to my sound card and start plugging away? Should I install resistors
    > > between probe and line in? Thanks in advance.
    > >
    > > Jeff
    >
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2001-03-29 16:26
    Hi Jeff,
    Another thing you could do is use a pot.
    Connect your probe between right- & left pin, conect the left pin to GND and
    connect the Line-In between left- & center pin. Then if you allways start
    with the wiper at the position nearest the GND-pin and slowly turn it up you
    would be safe.

    Good luck.
    /Henrik Olsson.
    Original Message
    > One of our members posted a link for a free computer based
    Oscilloscope.
    > http://polly.phys.msu.su/~zeld/oscill.html The documentation does not
    > contain instructions on attaching probes. Is it safe to attach a couple of
    > probes to my sound card and start plugging away? Should I install
    resistors
    > between probe and line in? Thanks in advance.
    >
    > Jeff
  • ArchiverArchiver Posts: 46,084
    edited 2001-03-29 16:57
    How about using a zener diode to ground to protect the input?

    Bandit

    At 12:18 PM 3/29/01 +0200, you wrote:
    >Jeff
    >I connect the inputs to the "line" input of my soundblaster PCI card,
    because the "mike" input is not stereo.
    >If you never connect to a device that uses more than 6V, no resistor or
    protection are needed.
    >Don't forget to select the line input and a suitable volume in the
    "recording" setup of your card.
    >Regards
    >ECO
    >
    Original Message
    >From: "Jeff Mitchell" <EL-JEFE@P...>
    >To: <basicstamps@yahoogroups.com>
    >Sent: jeudi 29 mars 2001 06:36
    >Subject: [noparse][[/noparse]basicstamps] Free Oscilloscope Questions
    >
    >
    >> One of our members posted a link for a free computer based Oscilloscope.
    >> http://polly.phys.msu.su/~zeld/oscill.html The documentation does not
    >> contain instructions on attaching probes. Is it safe to attach a couple of
    >> probes to my sound card and start plugging away? Should I install
    resistors
    >> between probe and line in? Thanks in advance.
    >>
    >> Jeff
    >
    >
    >
    >
    >
    >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-03-30 09:21
    Jeff,
    I posted the Scope link as many people were requesting such
    The software came from a sound card preamp kit
    The probes plug into the pre amp which as four position gain switch
    (10,1,0.1,0.001) which gives greater range than using the probes direct with
    the soundcard with the added bonus of isolation (to a degree)
    The preamp used a stereo in line giving the user two channel (Sound=L,R,Comm
    Scope=A,B,Comm)
    The kit can be obtained by mail order (should that be email order?) from
    either Dick Smith Electronics or Jaycar Electronics in Australia at
    www.dse.com.au and www.jaycar.com.au I think
    I have used mine for about twelve months now and couldn't be happier
    Any problems just send me an email
    Cheers
    Wayne
    Original Message
    From: "Jeff Mitchell" <EL-JEFE@P...>
    To: <basicstamps@yahoogroups.com>
    Sent: Thursday, March 29, 2001 2:36 PM
    Subject: [noparse][[/noparse]basicstamps] Free Oscilloscope Questions


    > One of our members posted a link for a free computer based
    Oscilloscope.
    > http://polly.phys.msu.su/~zeld/oscill.html The documentation does not
    > contain instructions on attaching probes. Is it safe to attach a couple of
    > probes to my sound card and start plugging away? Should I install
    resistors
    > between probe and line in? Thanks in advance.
    >
    > Jeff
    >
    >
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-03-30 17:39
    Wayne,

    What is the bandwidth of this Kit Scope. It is not
    listed in the advertisement from the web-site.
    Also, does the software allow you to do any storage or
    triggering?

    Thanks,
    Adam
    --- wayne <vegman@i...> wrote:
    > Jeff,
    > I posted the Scope link as many people were
    > requesting such
    > The software came from a sound card preamp kit
    > The probes plug into the pre amp which as four
    > position gain switch
    > (10,1,0.1,0.001) which gives greater range than
    > using the probes direct with
    > the soundcard with the added bonus of isolation (to
    > a degree)
    > The preamp used a stereo in line giving the user two
    > channel (Sound=L,R,Comm
    > Scope=A,B,Comm)
    > The kit can be obtained by mail order (should that
    > be email order?) from
    > either Dick Smith Electronics or Jaycar Electronics
    > in Australia at
    > www.dse.com.au and www.jaycar.com.au I think
    > I have used mine for about twelve months now and
    > couldn't be happier
    > Any problems just send me an email
    > Cheers
    > Wayne
    >
    Original Message
    > From: "Jeff Mitchell" <EL-JEFE@P...>
    > To: <basicstamps@yahoogroups.com>
    > Sent: Thursday, March 29, 2001 2:36 PM
    > Subject: [noparse][[/noparse]basicstamps] Free Oscilloscope Questions
    >
    >
    > > One of our members posted a link for a free
    > computer based
    > Oscilloscope.
    > > http://polly.phys.msu.su/~zeld/oscill.html The
    > documentation does not
    > > contain instructions on attaching probes. Is it
    > safe to attach a couple of
    > > probes to my sound card and start plugging away?
    > Should I install
    > resistors
    > > between probe and line in? Thanks in advance.
    > >
    > > Jeff
    > >
    > >
    > >
    > >
    > > Your use of Yahoo! Groups is subject to
    > http://docs.yahoo.com/info/terms/
    > >
    > >
    > >
    >
    >
    >
    >
    >
    > Your use of Yahoo! Groups is subject to
    > http://docs.yahoo.com/info/terms/
    >
    >


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  • ArchiverArchiver Posts: 46,084
    edited 2001-03-31 10:19
    Brad,
    The sampling being limited by the sound card to 44Khz, the theoretical bandwith
    is 22Khz.
    In fact, to be able to see more or less the form of the wave or pulse, you are
    limited to 10Khz.
    Triggering and storage are implemented.
    Take care that, depending of your sound card, the signal may be displayed
    inverted.
    This is not a problem for sound waves but well for pulses if you don't know.
    Regards
    ECO
    Original Message
    From: "Brad" <brad_028@y...>
    To: <basicstamps@yahoogroups.com>
    Sent: vendredi 30 mars 2001 18:39
    Subject: Re: [noparse][[/noparse]basicstamps] Free Oscilloscope Questions


    > Wayne,
    >
    > What is the bandwidth of this Kit Scope. It is not
    > listed in the advertisement from the web-site.
    > Also, does the software allow you to do any storage or
    > triggering?
    >
    > Thanks,
    > Adam
    > --- wayne <vegman@i...> wrote:
    > > Jeff,
    > > I ????? posted the Scope link as many people were
    > > requesting such
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