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This is a Java Script calculator that decodes the standard markings on commercial resistors.
The program is operated by pressing the buttons under the figure of the resistor above. The buttons increment the values of each standard color code. In the figure, the colors of the bands from left to right indicate: the ten's digit (band 1), the one's digit (band 2), the power of ten exponent (band 3), and the tolerance (band 4). Tolerance is the extent to which the actual resistance may deviate from the indicated value.
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The Java Script source code for this program can be viewed by using the View|Source command of your web browser.
You may use or modify this source code in any way you find useful, provided that you agree that the author has no warranty, obligations or liability. You must determine the suitablility of this source code for your use.
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This resistance value chart corresponds to the values obtained with the resistor decoder.
| Color | Value | Multiplier | Tolerance | |
|---|---|---|---|---|
| Black | 0 | 1 | ||
| Brown | 1 | 10 | ± 1% | |
| Red | 2 | 100 | ± 2% | |
| Orange | 3 | 1,000 | ± 3% | |
| Yellow | 4 | 10,000 | ± 4% | |
| Green | 5 | 100,000 | ||
| Blue | 6 | 1,000,000 | ||
| Violet | 7 | 10,000,000 | ||
| Grey | 8 | 100,000,000 | ||
| White | 9 | 1,000,000,000 | ||
| Gold | 0.1 | ± 5% | ||
| Silver | 0.01 | ± 10% | ||
| no color | ± 20% | |||
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