How To Calculate And Understand Resistor Values
Resistor Color Code Bands
& Other Component Identification
Resistor Color Code Identification
Alpha-Numeric Code Identification
This third band also has 2 new colors where gold = .1 and silver = .01.
The 4th band is the resistor's tolerance and shows how precisely the resistor was manufactured. Gold = 5%, silver = 10% and no band whatsoever = 20%.
Now that we know the values of each color, let's try calculating a few examples of resistance values.
Looking at resistor #1, we see the colors red red green gold.
The Color Codes chart "translates" this into 2 2 and 100,000
which equals 2 2 ×100,000 or 2,200,000 ohms and don't forget the gold 4th band which indicates a 5% tolerance.
Resistor #2 has the colors orange orange yellow silver which "translates" into 3 3 ×10,000 or 330,000 ohms and a tolerance of 10%.
Resistor #3 has the colors yellow violet silver meaning 4 7 ×.01 or .47 ohms and no fourth band indicates a 20% tolerance.
Use the 5 Band Chart to solve these next problems.
For resistor 4, we see the first 3 bands are violet, green and red which "translate" into 7, 5 and 2. Looking at the fourth band (the multiplier), we see it is brown and has a value of 10.
So, the resistance value is 7 5 2 × 10 which equals 7,520 ohms or 7.52 K ohms.
Band 5 is red which indicates a 2 per cent tolerance and a brown sixth band means that the temperature coefficient is 100 parts per million (ppm).Examining resistor 5, the first 3 bands are brown, black and blue and the fourth band (the multiplier) is green. So, these colors convert into 1 0 6 × 100,000 which calculates to 10,600,000 ohms or 10.6 Meg ohms.
The brown 5th band and the red 6th band mean that the resistor has a 1% tolerance and a 50 ppm temperature coefficient.