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OT : panel meters? — Parallax Forums

OT : panel meters?

ArchiverArchiver Posts: 46,084
edited 2000-05-23 00:02 in General Discussion
How exactly do panel meters work? Do they just display an analog voltage?
For example, my application would use one to display a temperature off of a
thermistor. Would any additional components be needed, or is it a straight
interface?

Thanks,
Jordan

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2000-05-21 22:34
    Usually they are 0 to 200 mV. Usually they have straps such that you can
    place the decimal point wherever you like.

    External resistors in a voltage divider are used to scale this to whatever
    you want.

    In conjunction with the PWM command it is a pretty inexpensive way to
    display a quantity. There is a discussion at;

    http://www.phanderson.com/stamp/

    Peter H. Anderson, Morgan State University
    pha@p..., http://www.phanderson.com
    Original Message
    From: Jordan Wilson <bloodspurt@h...>
    To: basicstamps@egroups.com <basicstamps@egroups.com>
    Date: Sunday, May 21, 2000 5:16 PM
    Subject: [noparse][[/noparse]basicstamps] OT : panel meters?


    :How exactly do panel meters work? Do they just display an analog voltage?
    :For example, my application would use one to display a temperature off of a
    :thermistor. Would any additional components be needed, or is it a straight
    :interface?
    :
    :Thanks,
    :Jordan
    :
    :
    :
  • ArchiverArchiver Posts: 46,084
    edited 2000-05-23 00:02
    ICL7106/7107 3 1/2 digit A/D converter from Intersil or Maxim is a device
    can be used in digital panel meter.
    O/P is directly connected to LCD/LED display.

    >From: Jordan Wilson <bloodspurt@h...>
    >Reply-To: basicstamps@egroups.com
    >To: basicstamps@egroups.com
    >Subject: [noparse][[/noparse]basicstamps] OT : panel meters?
    >Date: Sun, 21 May 2000 15:16:28 -0600
    >
    >How exactly do panel meters work? Do they just display an analog voltage?
    >For example, my application would use one to display a temperature off of a
    >thermistor. Would any additional components be needed, or is it a straight
    >interface?
    >
    >Thanks,
    >Jordan
    >
    >
    >

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