3 1/2 digit and 4 1/2 digit displays?

Discussion in 'General Electronics Chat' started by vinodquilon, May 20, 2010.

  1. vinodquilon

    Thread Starter Member

    Dec 24, 2009
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    What are 3 1/2 digit and 4 1/2 digit displays?
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    759
    3 and half digit & 4 and a half digit displays
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
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    3 1/2 digit has a maximum count of 1.999

    4 1/2 goes to 1.9999.

    The MSB is either 0 or 1. Don't know why that is considered a "half" digit.
     
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    that's not half...half is 0.5..........no
     
  5. someonesdad

    Senior Member

    Jul 7, 2009
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    Undoubtedly because some marketing person thought it up long ago...
     
  6. BMorse

    Senior Member

    Sep 26, 2009
    2,675
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    It can be used to show values from -1999 to 1999, and can include a decimal point, by lighting up the red segments, to suit the number you want.

    If you count the number of segment connections to each digit, you'll see that the 1st has only 4 wires, because there are only 4 segments.

    The other digits have 8 wires (Although we often refer to these as '7 segment' displays, if you include the decimal point, there are really 8 segments)

    We say that the left hand digit is only half a digit, as it has half the number of segment connections of a full digit.

    Here is a sample of a 3 1/2 Digit Display:

    [​IMG][​IMG][​IMG][​IMG]

    this was from here >>> http://www.london-electronics.com/digitresolution.php

    B. Morse
     
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