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Measuring Resistance — Parallax Forums

Measuring Resistance

ArchiverArchiver Posts: 46,084
edited 2001-05-06 19:55 in General Discussion
May someone point to me the best way to measure resistance in Ohms with
a BS2 ? Desired resolution is about 0.1 % or 1 in 1000 or less. Values
to be measured are from 2K up to 200K.
Thanks for any help
ACJacques

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-05-06 19:55
    >May someone point to me the best way to measure resistance in Ohms with
    >a BS2 ? Desired resolution is about 0.1 % or 1 in 1000 or less. Values
    >to be measured are from 2K up to 200K.
    >Thanks for any help
    >ACJacques

    Hi Jaques,

    That accuracy level (10 bits, 0.1%) is on the borderline of what can
    be achieved with RCtime (or any RCtime circuit like the '555).

    If you have a 10 or 12 bit A/D converter, then the resistance can be
    converted to a voltage with a divider or an op-amp circuit.

    -- regards,
    racy Allen
    electronically monitored ecosystems
    mailto:tracy@e...
    http://www.emesystems.com
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