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## Resistor Color Code Secrets

Understanding the resistor color code is very important if you want to calculate the resistance values of a particular resistor. Each color group of the resistor represents a number where you can refer to the code below to help you find the typical resistance value. Resistor coding works like a resistance calculator and with the examples provided, it won’t take you long to figure it out.

0=black, 1=brown, 2=red, 3=orange, 4=yellow, 5=green, 6=blue, 7=violet, 8=grey, 9=white, gold=5% and silver=10%

Red, red, orange, gold = 22 times 1 (orange equals the third zero), so you get 22 times 1000 = 22000 ohms or 22 kilo ohms with a tolerance of +/-5% (gold) .

Blue, gray, brown, gold = 68 times 1 (brown equals one zero), so you get 68 times 10 = 680 ohms with a tolerance of +/- 5%.

Brown, black, yellow gold = 10 times 1 (yellow equals four zeros), so you get 10 times 10000 =100000 ohms or 100 kilo ohms with a +/-5% tolerance.

Yellow, violet, gold, gold = 47 times 0.1 (gold in the third band), so you get 4.7 ohms with a tolerance of +/-5%

Orange, orange, silver, gold =33 multiplied by 0.01 (silver in the third band), so you get 0.33 ohms with a tolerance of +/-5%.

In electronic repair, most of the time I have come across the five band color code. The purpose of using a five-color resistor in a circuit is that it gives a more accurate value compared to a four-color group. For example to get the value of 22.6kohm, with four color band resistor you will not be able to get it. The best you can get is 22k (red, red, orange and gold).

If you have a five color belt you will be able to count (red, red, blue, red, brown) the last color brown represents 1% tolerance. If you open an analog multimeter you will understand what I mean. Most resistor circuits inside a multimeter use five color bands. Why? Because the reading you get when measuring current, voltage or ohms, the panel will show the closest value. For example, if you measure a 9v battery the needle will point to either 8.9v, 9v, or 9.1 volts. If that particular multimeter was designed using four color band resistors the output we get would be 8.5v, 9.5v or 10 volts. In other words the use of five colors of band resistance makes the circuit more precise and produces the desired output as the engineers want it to be.

If you come across any wound resistance wire, there are numbers printed on the resistor and each code represents a resistance value. Below are the formulas you can use to find exact resistance values: R82 is .82 ohm, 15R2 is 15.2 ohm, 100R is 100 ohm, 10K is 10 kilo ohm, 2K7 is 2.7 kilo ohm, and 2M2 is 2 ohm. I hope you will find this resistor color code article and be able to calculate the resistance value in the shortest possible time.

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