Reading resistor value by color band

Collapse
X
Collapse
+ More Options
Posts
 
  • Time
  • Show
Clear All
new posts
  • Askic
    Senior Member
    • Sep 2018
    • 187
    • BIH

    #1

    Reading resistor value by color band

    Hello,

    attached is a picture with two resistors. I wonder what values are based on color of the band.
    I have used this as a reference:
    https://www.electronics-tutorials.ws...tor/res_2.html

    Since there are 5 bands, the question is from where to start counting (what is the first band).
    Based on this info, I can conclude that thick band is the last one.
    Therefore the values are:
    Left resistor - red(2) yellow(4) black(0) black (x1) brown (1% tol) = 240 ohm, 1% tolerance
    Right resistor - brown(1) black(0) black(0) gold(x0.1) purple (0.1%) = 10 ohm, 0.1% tolerance

    Is that right?
    Attached Files
  • Macroman
    Member
    • Feb 2022
    • 22
    • USA/Philippines

    #2
    Re: Reading resistor value by color band

    I found this to check resistor color codes...Being a newbie, it sure helps me.
    Hope it is of help to you.


    https://resistorcolorcodecalc.com/

    Comment

    • eccerr0r
      Solder Sloth
      • Nov 2012
      • 8695
      • USA

      #3
      Re: Reading resistor value by color band

      Another thing I wish for these javascript resistance calculators: they should give a warning when the resistor is not a standard value for the tolerance given...would be a very good hint that the color bands were possibly read wrong.

      Comment

      • desert-rat
        Badcaps Legend
        • Mar 2014
        • 4103
        • USA

        #4
        Re: Reading resistor value by color band

        It looks like brown,black, black, gold. 10 ohms, but can use an ohms meter .

        Comment

        • jssamp
          Member
          • Jan 2022
          • 22
          • U.S.

          #5
          Re: Reading resistor value by color band

          Those are standard values. The left resistor if it is read the other way would be 1MΩ 2%.

          Hints: The first band is never black, gold or silver;
          Gold and silver only the last 2 bands.

          Comment

          • R_J
            Badcaps Legend
            • Jun 2012
            • 9535
            • Canada

            #6
            Re: Reading resistor value by color band

            Originally posted by jssamp
            Those are standard values. The left resistor if it is read the other way would be 1MΩ 2%.

            Hints: The first band is never black, gold or silver;
            Gold and silver only the last 2 bands.
            The first band CAN be Black, as in this resistor 0.47Ω 1% Often used in power supplies.
            Attached Files
            Last edited by R_J; 03-24-2022, 11:11 AM.

            Comment

            • jssamp
              Member
              • Jan 2022
              • 22
              • U.S.

              #7
              Re: Reading resistor value by color band

              Originally posted by R_J
              The first band CAN be Black, as in this resistor 0.47Ω 1% Often used in power supplies.
              I've never run across one of those. Thanks for teaching me something today!

              Comment

              • eccerr0r
                Solder Sloth
                • Nov 2012
                • 8695
                • USA

                #8
                Re: Reading resistor value by color band

                Any idea what brand that resistor is... that resistor is not following convention and still does not depict 0.470, which is more precise than 0.47 . Yes, it does allow lower resistor ratings for 1% but that's really cheating.

                Sort of annoying when I saw brown-black-black-red = 10K... which is what it should be, though it kind of annoyed me as brown-black-orange was the 5% / 10% indication of 10K.
                Last edited by eccerr0r; 03-26-2022, 03:05 PM.

                Comment

                Related Topics

                Collapse

                • JenneDezaeger
                  5-band resistor starting with black?
                  by JenneDezaeger
                  Can anyone tell me how it's possible for a 5-band resistor to start with black?
                  If it really was a zero-ohm resistor it probably wouldn't have burned.
                  So if there are any ideas on the value of this resistor and how to read it, please let me know.

                  Greetings,

                  Jenne...
                  12-06-2022, 06:16 AM
                • jinu_j
                  Dell 2209WA - power supply - Fusible Resistor replacement
                  by jinu_j
                  Hi

                  I am trying to repair an ancient Dell 2209WA Monitor which suddenly shut off with a pop sound. On investigation found that one of the fusible resistors had blown. Further investigation identified multiple components as faulty because of which the fusible resistor blew. Please refer the attached circuit diagram showing the components that were found to be damaged.

                  1. FR950 - blown fusible resistor - 0.2 Ohm 1W
                  2. Q950 - shorted Q950 MOSFET - 650V 10A N Channel Mosfet
                  3. R835 - Blown Resistor - 20KOhm SMD resistor
                  4. D930 - Shorted Schottkey Diode...
                  05-03-2025, 10:51 PM
                • MidnightRoller
                  Can a resistor lose resistance after hot air?
                  by MidnightRoller
                  I am curious if a 0402 resistor could go from 43 ohm to 0. In electronics class and my experience a resistor can degrade and gain resistance all the way up to not being able to conduct at all. I have never heard of a resistor decreasing in resistance and becoming 0 ohm or a dead short… that's not the direction they fail… or so I thought.

                  I was attempting to remove a wson8 chip on an iMac motherboard and it required a lot of heat, on one side of the chip were 3 0402 resistors that were very close. I popped the chip out unintentionally out of the tweezers and sent those resistors...
                  02-02-2022, 11:46 PM
                • magneh
                  Is this some kind of fuse resistor ?
                  by magneh
                  Hello guys

                  Taking a look at some KNX domotic modules that were toasted due to some kind of electrical failure, I found out 2 weird looking resistors.

                  Seem to me like some kind of fuse resistor?
                  After diggin a bit seems like a fuse wirewound resistor wafer or whatever that is

                  They are very toasted but I think the 5 band colours are RED GOLD BLACK ORANGE ORANGE or the opposite, not sure which is the first band.
                  The red band is larger than the 4 others, but I dont have much experience with these components.

                  Also one of the orange...
                  02-10-2025, 07:54 AM
                • artvandalai
                  What resistor ohm will work better to repair this waterpik?
                  by artvandalai
                  The resistor on this waterpik blew. I changed it with the a similar spec 47ohm 2 watt yageo resistor but it still keeps blowing the resistor. Checking with the multimeter the motor, capacitor, diodes, and thermal fuse all checked normal. Will a higher ohm resistor work better? What ohm resistor will work better to repair this waterpik? This video is showing the repair with a 56 ohm resistor https://www.youtube.com/watch?v=_J7_rV7ui1Y
                  01-05-2025, 04:10 PM
                • Loading...
                • No more items.
                Working...