37 lines
987 B
Markdown
37 lines
987 B
Markdown
# Resistor Color Code Calculator
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A simple web app for computing the the resistance of a resistor.
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## Development
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### Using PHP's built-in web server (PHP must be installed on your machine):
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``` bash
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php -t . -S localhost:4000
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# or
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make server-start
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```
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## Reference
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### Color Values
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From https://en.wikipedia.org/wiki/Electronic_color_code.
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Color | Value | Multiplier | Tolerance | HEX Color | PPM
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---|---|---|---|---|---|
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None | - | - | ±20% | - | -
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Pink | - | 0.001 | - | #e91e63 | -
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Silver | - | 0.01 | ±10% | #b0bec5 | -
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Gold | - | 0.1 | ±5% | #ffea00 | -
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Black | 0 | 0 | - | #212121 | 250
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Brown | 1 | 10 | ±1% | #795548 | 100
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Red | 2 | 100 | ±2% | #f44336 | 50
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Orange | 3 | 1 000 | - | #ff9800 | 15
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Yellow | 4 | 10 000 | ±5% | #fdd835 | 25
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Green | 5 | 100 000 | ±0.5% | #4caf50 | 20
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Blue | 6 | 1 000 000 | ±0.25% | #2196f3 | 10
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Violet | 7 | 10 000 000 | ±0.1% | #9c27b0 | 5
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Gray | 8 | 100 000 000 | ±0.05% | #9e9e9e | 1
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White | 9 | 1 000 000 000 | - | #fafafa | -
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