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Refer to the preceding figure for the color code for the tolerance of a resistor. This means that the value 52 MΩ can vary by up to 5% in either direction, so the value of the resistor is 49.4 MΩ - 54.6 MΩ.Coded components have at least three bands: two significant figure bands and a multiplier, but there are other possible variations. The 5% tolerance resistor may have a maximum and minimum value of resistance.Finally, we get the final value of resistance is in the range of 22,050 to 19,950 Ω.Once you know to calculate resistance using colour Code of resistors, it will be easy for you to design and using resistors in the electronics circuit.If you have any queries, you can hit the comment in given comment.I am a master in Electrical Power System. I hope this helps. A couple of tricks can cut this task down to size. Hi Jason.

Hi Kevin, thanks for your question. I find a lot of websites are not that helpful, but I must congratulate you on this site which is lovely to use and so helpful, well done and many thanks. This number is the multiplier. But how to indentifd which one band 1 & 4 pleas say If the resistor has four coloured bands; three of the bands will be roughly an equal distance apart and relatively close together, the fourth will be slightly further away from the other bands. Those bands tell you the value of the resistor. Hope this helps. Then get a resistor that you know the value of, if you don't have one to hand google one for the picture. And the last band (D) shows the tolerance of resistance in percentage.Firstly, you should refer the resistor colour band table given below.Here, each band position and its colour has specific significance to calculate resistance value.So the final formula you can use to calculate resistance:Consider, a resistor is having four different colour bands red, brown, orange, and gold respectively as shown in the below diagram.The Red band of the resistance value is 2 and the brown band of the resistance value is 1 from the table. why is it 180,000 ohms? I've typed this into multiple resistor calculators and they all say 180k ohms. How can I determine the ohms of the resistors so I can replace them? This calculator assumes the conductor is round.An electronic color code is a code that is used to specify the ratings of certain electrical components, such as the resistance in Ohms of a resistor. Using the table provided below, the green band represents the number 5, and the red band is 2.The third, blue band, is the multiplier. HOW TO CALCULATE RESISTOR & CERAMIC CAPACITOR VALUE. 18 × 1000 = 18,000 which = 18k ohms. Therefore, select the next higher value of power rating.
In a typical four-band resistor, there is a spacing between the third and the fourth band to indicate how the resistor should be read (from left to right, with the lone band after the spacing being the right-most band). thank you for your kindness and offering , i now know how to determine the value of a resistor using color code system but how do you deal with the tolerance of the resistors connected in series? I consulted with Alasdair, one of our Engineers and here is his suggestion; “This is a tricky one. Because 5 percent of 470 is 23.5, the actual resistance could be as much as 23.5 Omega Most standard resistors have tolerances of 5%, 10%, or 20%, and most precision resistors have tolerances of 1% or 2%. Thanks a lot for your time and impartation. If one of the outer bands is silver or gold, that band is probably the last band, so the first band is at the other end. i am really confused, we have a test tomorrow and i still dont understand how to calculate the value of a resistor or the tolerance value or the tolerance range Hi Benjamin, when designing your circuits and working out the values of the components you will need, you will be working with absolute values. You should hold the resistor so the forth band is to the right then read the resistor values from left to right. So, if you buy a 100 Omega precision resistor, chances are its actual value is within 1 or 2 of 100 Omega.The following figure shows a diagram of the color code of a standard (four-band) resistor. Look up the color of the first band in the column labeled “1st digit” and find the number associated with that color. The first two digits of the band show the value of resistance 2 and 1 i.e. When a circuit does not exceed the power rating, the resistor works reliably and without fuss for decades. While circuits can be highly complicated, and there are many different ways in which resistors can be arranged in a circuit, resistors in complex circuits can typically be broken down and classified as being connected in series or in parallel.The total resistance of resistors in parallel is equal to the reciprocal of the sum of the reciprocals of each individual resistor. Here’s how you use the color code to figure out the nominal value of the resistor (refer to the figure): Decide which band is the first band. I Can only get 3.9Kohms, would I be able to use this? The following are tools to calculate the ohm value and tolerance based on resistor color codes, the total resistance of a group of resistors in parallel or in series, and the resistance of a conductor based on size and conductivity.Use this calculator to find out the ohm value and tolerance based on resistor color codes.Use the following to calculate the resistance of a conductor. ok, so example #3 says brown, gray, yellow. Thanks Hi Maju, You can test the actual resistance value of the resistor with a multimeter and then compare against the expected value of the resistor =/- the tolerance band value. I hope this helps. Electronic color codes are also used to rate capacitors, inductors, diodes, and other electronic components, but are most typically used for resistors.

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