colour code

Discussion in 'General Electronics Chat' started by jim blogs, Jul 10, 2014.

  1. jim blogs

    Thread Starter New Member

    Jul 10, 2014
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    What value is a resistor: orange orange violet.
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    I make it 33x10^7 or 330,000,000Ω or 330MegΩ

    I have never seen a carbon or metal film resistor that high. I have a couple that go to about 22Meg. (red red green)

    Are you sure it is a resistor?
     
    Last edited: Jul 10, 2014
  3. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,999
    745
    other way round would be 73K,maybe its a cap ?
     
  4. wayneh

    Expert

    Sep 9, 2010
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    A picture is worth a thousand words.
     
  5. DerStrom8

    Well-Known Member

    Feb 20, 2011
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    Here's a little app I wrote for people to learn the color codes.

    These are the values to memorize:

    Black = 0
    Brown = 1
    Red = 2
    Orange = 3
    Yellow = 4
    Green = 5
    Blue = 6
    Violet = 7
    Gray = 8
    White = 9

    Gold = 5% tolerance
    Silver = 10% tolerance
    None = 20% tolerance

    The first two bands represent the value, the third band represents the multiplier (multiply the "value" of the first two bands by this number), and the last is the tolerance.
     
  6. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    I find violet and brown hard to distinguish at times. Orange-orange-brown (330) is a much more reasonable value. That is why I test them.

    John
     
  7. DerStrom8

    Well-Known Member

    Feb 20, 2011
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    Agreed. Once again, a photo would be very useful right now.
     
  8. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    Double agreed! Ora,ora,brown is very common and I have seen tons of brown bands that looked violet, either from heat discolouring or just from iffy "brown" paint.

    These days the colour bands are terrible colours, I'm not sure if it is the manufacturers cutting costs on "obsolete" through hole resistors or the modern trend to remove toxic paint pigments from use (wrecking all the good colours).

    Probably a bit of both.
     
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