In electronic circuits there are many resistors. Most are physically small and are identified by coloured bands. Newer boards contain very small devices that are surface mounted and have their value printed on them. These are not easy to distinguish from small capacitors. Reistors which have a higher power rating may have their resistance value printed on them.
Colour | Band 1 | Band 2 | Band 3 | Band 4 | Band 5 | |
---|---|---|---|---|---|---|
Black | 0 | 0 | x1 | 200 ppm | ||
Brown | 1 | 1 | x10 | 1% | 100 ppm | |
Red | 2 | 2 | x100 | 2% | 50 ppm | |
Orange | 3 | 3 | x1000 | 15 ppm | ||
Yellow | 4 | 4 | x10,000 | 25 ppm | ||
Green | 5 | 5 | x100,000 | 0.5% | ||
Blue | 6 | 6 | x1,000,000 | 0.25% | 10 ppm | |
Grey | 7 | 7 | 0.1% | 5 ppm | ||
White | 8 | 8 | 1 ppm | |||
Gold | 9 | 9 | 5% | |||
Silver | 10% |