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Newbie Question

Discussion in 'Electronic Design' started by ThepHampton, Dec 21, 2004.

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  1. ThepHampton

    ThepHampton Guest

    I'm a vb programmer. I need to read a basic on/off switch and wanted
    recomendations on the best way to do this. It sounds like the parallel port
    may be an easy/innexpensive way. I also want the ability to read many of
    these from one computer. For instance I might need to read up to 60 at a
    time. That tells me serial because it's expandable. I've also hear about
    digital input but it sounds like I don't need that. So my rec is:

    Need ability to expand to read many switches
    Innexpensive
    Easy (since I'm an electronic newbie)

    Any recomendations appreciated.
     
  2. Rich Webb

    Rich Webb Guest

    http://www.measurementcomputing.com/cbicatalog/cbiproduct_new.asp?dept_id=350&pf_id=1667

    (Long URL -- if it's mangled, go to www.measurementcomputing.com and
    search for part number USB-1096HFS.)

    That's probably as easy a way as you'll find to read a bunch of discrete
    contacts (i.e., without multiplexing or a switch matrix of some kind).
    Includes a Visual Studio .NET component; the example shows a VB window.

    There are other approaches but this is as close to plug'n'go as you're
    likely to find.
     
  3. Since computers do only one thing at a time, you have to first decide
    how often you need to read the values of these switches, and how close
    to simultaneity "at a time" means.
     
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