Resistor color codes are something that every electronics hobbyist should remember. Using a resistor and capacitor together can create a timing source necessary for light flashers or electronic siren circuits. Deviating Colors In order to prevent metal and other particles from getting in the coating of high voltage resistors, the gold and silver bands are often replaced with a yellow and gray band. The tolerance of a resistor is the maximum difference between its actual value and the required value and is generally expressed as a plus or minus percentage value. Standard Resistor Value Series and Tolerances The standard E3, E6, E12, E24, E48 and E96 resistor values are listed below.
This number is the second digit of the resistance. The only way to read it is with a multi-meter across the leads 3 How do I remember this sequence of colors? Just choose how many bands does your resistor have - 4, 5 or 6, select the colors, and in the blink of an eye you'll get the resistance with tolerance, range and temperature coefficient value if you've chosen 6 band resistor color code. The resistor colour code markings are always read one band at a time starting from the left to the right, with the larger width tolerance band oriented to the right side indicating its tolerance. How do I make certain what the value of the resistor really is? For example, a resistor with green, blue, silver and gold rings has a value of 56 x 0. There are many different types of Resistor available which can be used in both electrical and electronic circuits to control the flow of current or to produce a voltage drop in many different ways. Anyway, on with the better one! While acceptance of cookies and tracking technologies is voluntary, disabling them may result in the website not working properly, and certain advertisements may be less relevant to you.
It wasn't so hard, was it? This page should make it possible to understand how these codes work and remove the mystery from them. Resistor Band Colors As shown above, a carbon-composition resistor can have 4 to 6 bands. The tolerance band is situated with some gap from the other 2-3 bands so we get the idea from where to start with. This helps the supplier with stocking different values. Surface Mount Resistors are printed with either a 3 or 4-digit numerical code which is similar to that used on the more common axial type resistors to denote their resistive value. Write it next to the other two digits, with a multiplication sign before it. You should always attempt to work out the value, then check your result against a resistor value chart to see if it's listed there.
This indicates that for 50 ppm, the resistance of 2 ohms will change at 40° C. Example on how to use this resistor color code calculator We've tried really hard to make the resistor color code calculator as simple and intuitive as possible, but if you have any problems, just have a look at the example below! The fourth band shows the tolerance and mostly seen in high precision resistors. The multiplier in this case is 10 0, which is 1, because any number raised to the 0th power equals 1. Instead, resistors are manufactured in what are commonly known as Preferred values. Resistors come in a range of tolerances but the two most common are the E12 and the E24 series. There are various values of resistors available from some ohms to millions of ohms.
Always read resistors from left to right. If your resistor has five or six color bands, the third band becomes this additional digit along with bands one and two. To determine the exact range that the resistor may be, take the value of the resistor and multiply it by 5%, 10%, or 20%. This packaging allows the zero-ohm resistor to be placed on the circuit board using the same equipment typically used to place other resistors. A 6-band resistor is like a 5-band but includes a temperature coefficient band.
In the resistor shown in the preceding figure, the two-digit number is 47 and the multiplier is 10, so the nominal value is An easy way to multiply a whole number by a power of 10 that is, 10 0, 10 1, 10 2, 10 3, and so on is to just append meaning tack on to the end the whole number with zeros, and use the exponent which is the small, raised number next to the 10 to tell you how many zeros to append. Best method to memorize is - B. You start reading on the end that the bands are closest to. By matching the colour of the first band with its associated number in the digit column of the colour chart below the first digit is identified and this represents the first digit of the resistance value. How can I calculate its value? Although people in the industry have been aware of their fundamental capabilities for decades, a reliable resistor as we know them today did not come about until 1961 when Otis Boykin created a low-cost, reliable resistor that allowed a precise amount of electricity to pass to a component. How to read the code Resistors are color coded for easy reading.
Compare the ends of the resistor. Some common issues while decoding the is color blindness. Reliability Band When resistors are produced in accordance to military specifications, they will often include a band that indicates reliability. Tolerance Explained Resistors are never the exact value that the color codes indicate. Look at the first color band and determine its color. The company maintains a network of more than 349 locations serving over 80 countries. There's a lot of options, depending on tolerance and number of bands.
The temperature coefficient is more commonly marked, especially on quality 5-band resistors, as it starts to become an important factor for precision components. Therefore manufacturers place a tolerance color band on the resistor to tell you just how accurate this resistor is made. If the multiplier band is gold or silver, then the decimal point is moved to the left one or two places divided by 10 or 100. Enter the first five colors. Four Band Resistor 4 band Resistor The four band resistor indicates the first digit for the 1 st band, second digit for the 2 nd band, third digit for 3 rd band multiplier or power of 10 and the fourth digit for 4 th band represent tolerance of ±5%, ±10%, and ±20%. If none of the above appear to help your problem, you can always use a multimeter to tell between two possible resistances - and reading directions. This article has also been viewed 188,883 times.