https://github.com/fdelporte/resistorcalculator
Java library to calculate resistor values and their use in circuits
https://github.com/fdelporte/resistorcalculator
Last synced: 3 months ago
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Java library to calculate resistor values and their use in circuits
- Host: GitHub
- URL: https://github.com/fdelporte/resistorcalculator
- Owner: FDelporte
- License: apache-2.0
- Created: 2019-11-24T20:44:52.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2020-06-05T06:58:08.000Z (almost 5 years ago)
- Last Synced: 2025-01-13T13:31:08.134Z (4 months ago)
- Language: Java
- Size: 39.1 KB
- Stars: 3
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
- License: LICENSE
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README
# Resistor Calculator
Java library to calculate resistor values based on the color coding and their use in electronic circuits.
## How to use
### Resistor color coding
Available as ColorCode.BLACK, ColorCode.BROWN... and includes all values listed in this table:
| ColorCode | HEX color | Value | Multiplier | Tolerance (%) | Temp. coeff. (ppm/K) |
| :---: | :---: | :---: | :---: | :---: | :---: |
| BLACK | #000000 | 0 | 1Ω | | 250 |
| BROWN | #761d1d | 1 | 10Ω | 1.0 | 100 |
| RED | #cc0000 | 2 | 100Ω | 2.0 | 50 |
| ORANGE | #ffa500 | 3 | 1KΩ | | 15 |
| YELLOW | #ffff00 | 4 | 10KΩ | 0.0 | 25 |
| GREEN | #008000 | 5 | 100KΩ | 0.5 | 20 |
| BLUE | #0000cc | 6 | 1MΩ | 0.25 | 10 |
| VIOLET | #ee82ee | 7 | 10MΩ | 0.1 | 5 |
| GREY | #808080 | 8 | 100MΩ | 0.25 | 1 |
| WHITE | #ffffff | 9 | 1GΩ | 0.0 | |
| GOLD | #ffd700 | | 0.1Ω | 5.0 | |
| SILVER | #c0c0c0 | | 0.01Ω | 10.0 | |
| NONE | | | | 20.0 | |
### Calculate value of a resistor based on 3, 4, 5 or 6 ColorCodes
#### Example with 3 ColorCodes
```
ColorValue value3band = Calculate.resistorValue(
Arrays.asList(ColorCode.ORANGE, ColorCode.ORANGE, ColorCode.BROWN)
);
System.out.println(Convert.toOhmString(value3band.getOhm())); // Result: 330Ω
System.out.println(value3band.getTolerance() + "%"); // Result: 20.0%
```
#### Example with 6 ColorCodes
```
ColorValue value6band = Calculate.resistorValue(
Arrays.asList(
ColorCode.ORANGE, ColorCode.WHITE, ColorCode.BLACK,
ColorCode.SILVER, ColorCode.BROWN, ColorCode.RED
)
);
System.out.println(Convert.toOhmString(value6band.getOhm())); // Result: 3.9Ω
System.out.println(value6band.getTolerance() + "%"); // Result: 1.0%
System.out.println(value6band.getTemperatureCoefficient() + "ppm/K"); // Result: 50ppm/K
```
### Calculate required resistor value for a LED
```
// Calculate.resistorForLed(double sourceVoltage, double ledVoltage, double ledCurrent)
System.out.println(Calculate.resistorForLed(3.3, 2.2, 0.02)); // Result: 55
```
### Calculate total value for resistors in serial or parallel
```
// Calculate.serial(List values) {
System.out.println(Calculate.serial(Arrays.asList(2D, 5D, 7D))); // Result: 14
// Calculate.parallel(List values)
System.out.println(Calculate.parallel(Arrays.asList(10D, 2D, 1D))); // Result: 0.625
```
## Read more
These are some of the sources used to write the functions in this library
* https://www.wikihow.com/Calculate-Total-Resistance-in-Circuits
* http://www.ohmslawcalculator.com/led-resistor-calculator
* http://www.resistorguide.com/resistor-color-code/
* https://learn.sparkfun.com/tutorials/resistors/decoding-resistor-markings
* https://learn.sparkfun.com/tutorials/light-emitting-diodes-leds/all