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Thread: System monitor w/RoadRunner

  1. #21
    Low Bitrate
    Join Date
    Oct 2006
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    76
    Ok, that sounds good. Shot the math into the calculators and seems good.

    Here is a "final" diagram of what i am going to be doing.
    This shows use of a LF353 from national semiconductor.
    http://www.national.com/mpf/LF/LF353.html



    I am going to run some numbers on what the sensitivity of the whole circuit is going to look like. I am hoping that this thing isnt gonna only be able to see a difference of 10 or 15 amps and be incredibly jumpy.

    Let me know what you guys think of the setup.

    Also, as far as input voltage into the LF353 and the FusionBrain itself, can i use un-regulated +12v from the vehicle, or would i need to use a voltage regulator?

    If it is not required, will it be benificial to add the regulator to get a more accurate read or more consitant output? Or will it not matter? The national semiconductor site lists 10-36 volts for supply voltage.

    Thanks everyone, especially greenman, you guys have been a ton of help!
    -Nick

  2. #22
    Newbie
    Join Date
    Apr 2008
    Location
    Baghdad, Iraq/Fort Bragg, NC/Saginaw, MI
    Posts
    27
    I'm not really good with electronics, but your best bet, for a "fluid" effect, is to ensure the output uses the full range, between 0 and 5v. IE, 0 amps = 0v, 150 amps = 5v... I'm sure theres a way to accomplish this... but most of my electronics work has been done via trial and error... IE, plugging things in, and seeing what happens =D

    peace
    Mike

  3. #23
    Fusion Brain Creator
    Join Date
    Mar 2005
    Posts
    2,221
    LF353 needs regulation, FB doesnt, they must share the same ground

  4. #24
    Low Bitrate
    Join Date
    Oct 2006
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    76
    Any recommendations on what voltage i should run the LF353 at or is anything from 10-36 volts ok?

  5. #25
    Fusion Brain Creator
    Join Date
    Mar 2005
    Posts
    2,221
    a 9v reg should do fine

  6. #26
    Low Bitrate
    Join Date
    Mar 2006
    Posts
    71
    Did this go any further forward guys, got a few uses for this circuit

  7. #27
    Low Bitrate
    Join Date
    Oct 2006
    Posts
    76
    Sorry about the break in info guys.

    Had some personal stuff going on, and a promotion at work!

    Im going to get back on working on this module some more, keep tuned for updates

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