You can use a multimeter to find out the actual resistance, but note that it will also vary slightly with temperature. In 6 band resistors, the temperature dependence is given by the last band (more on this below). They are read exactly the same way as five band resistors, except that the (additional) last band tells us the temperature coefficient. Color Four band resistors have two bands for the value, one for the multiplier, and one for the tolerance. I can devide every value by 10, keeping the balance the same, while having the right pulldown value. The coding is defined in the international standard IEC 60062:2016. It describes the coding standard for both resistors and capacitors. Reading Color Codes

This calculator will help you identify the value, tolerance and temperature coefficient of a color coded resistor by simply selecting the bands colors. It will also calculate the minimum and maximum values based on the tolerance ratio. This calculator supports resistors with 3, 4, 5, and 6 bands. How to use? Band One – 1 st Digit: This is the first digit of the resistance value. The first band is brown, which corresponds to a value of 1. In the standard four band resistors, the first two bands indicate the two most-significant digits of the resistor's value. The third band is a weight value, which multiplies the two significant digits by a power of ten. It was a hell of a job to find the right values to reach a wide range of values, fairly equaly spread.

Resistor Color-coding

Let's take for example a four-band resistor with the following band colors: Violet Green Yellow Gold In a six-band resistor, the first five bands have the same representation as a five-band resistor followed by one extra sixth band that represents the temperature coefficient of resistance (TCR). Tolerance Since it is a four-band resistor, the first two bands (violet and green) will indicate the significant digits which are, according to the table above; 75.

To calculate the minimum and maximum resistance values, we multiply the resistance value by the tolerance percentage to come up with the following values: Peek inside the guts of a few carbon-film resistors. Resistance values from top to bottom: 27Ω, 330Ω and a 3.3MΩ. Inside the resistor, a carbon film is wrapped around an insulator. More wraps means a higher resistance. Pretty neat! A 100K resistor is a type of resistor with a value of 100,000 ohms. Resistors are passive electronic components that are used to resist the flow of electrical current in a circuit. They are commonly used to limit the current in a circuit, to divide the voltage in a circuit, to provide a reference voltage, or to create a voltage drop in a circuit. The value of a resistor is expressed in ohms, and it determines the amount of resistance that the resistor offers to the flow of electrical current. The higher the value of the resistor, the more resistance it offers, and the lower the current that will flow through it.Six band resistors are exactly like five band resistors except they have an extra band to indicate the temperature coefficient, i.e. how much the resistance will change with temperature. Band Four – Tolerance: Gives the value of the tolerance for the resistor. The most common values are 5% (designated by a gold band), and 10% (designated by a silver band). This example uses a gold band, giving us a tolerance of 5%. In a five-band resistor, the first three bands represent the first three significant digits. The fourth band represents the multiplier. The fifth band represents the tolerance. It is very easy to read 5 or 6 band resistors if you already know how to use four band resistor color coding. 5 Band 100K Resistor Color Code

I wrote a little code in excel, to whatch the effect of changing the value(s) of the resistor(s), which of course had to be within the common E12 range.So the total value of the resistance given by the colors is 10 (from digits) x 10 5 (from multiplier) Ω = 100,000Ω = 100k Ω. Band Three – Multiplier: Takes the digits and multiplies them by a value given by this band. The actual multiplier is 10 n, where n is a value that corresponds to the color of the band. In this case, the third band is yellow which corresponds to the number 5. Therefore the multiplier is 10 5 = 10,0000. So it was decided that "R" would represent a "x1" multiplier. So now you can write "39R" instead of "39Ω". More commonly, there are five-band resistors that are more precise due to a third significant figure band. This shifts the position of the multiplier and tolerance band into the 4 th and 5 th position as compared to a typical four-band resistor.