Resistor color codes

Color Codes

Number	Color	Tolerance
0	Black	0%
1	Brown	±1%
2	Red	±2%
3	Orange	-
4	Yellow	-
5	Green	-
6	Blue	-
7	Violet	-
8	Gray	-
9	White	-
-	Gold	±5%
-	Silver	±10%
-	no band	±20%

For example in this example , value of the resistor is ;

• 1.Digit = Yellow = 4
• 2.Digit = Orange = 3
• Zeros = Red = 10^2
• Tolerance
  • Gold = ±5%
  • Silver = ±10%
  • No Band = ±20%

R = (43 * 10^2) ±10% = 4300 ± 10% = 3870 ~ 4730 ohms

Practice:

What is the resistance?

red brown blue 21000000 ohms

green yellow yellow 540000 ohms

orange violet brown 370 ohms

green red red 5200 ohms

Are these correct? Yes.

External Link

• [1] dot com [/nozomsite/resistor1.htm] - Resistance Color Codes Tutorial With Examples and Calculator.