LED 颜色编码

复制import re

# 4 环电阻色环 → 阻值（单位 Ω）
COLOR_MAP = {
    'black': 0, 'brown': 1, 'red': 2, 'orange': 3, 'yellow': 4,
    'green': 5, 'blue': 6, 'violet': 7, 'gray': 8, 'white': 9
}
MULTIPLIER_MAP = {
    'black': 1, 'brown': 10, 'red': 100, 'orange': 1000, 'yellow': 10000,
    'green': 100000, 'blue': 1000000, 'violet': 10000000, 'gray': 100000000, 'white': 1000000000
}
TOLERANCE_MAP = {'brown': 1, 'red': 2, 'green': 0.5, 'blue': 0.25, 'violet': 0.1, 'gray': 0.05, 'gold': 5, 'silver': 10}

def four_band_resistor(band1, band2, band3, band4):
    """输入颜色英文名，返回阻值和误差"""
    sig = COLOR_MAP[band1] * 10 + COLOR_MAP[band2]
    mult = MULTIPLIER_MAP[band3]
    tol = TOLERANCE_MAP.get(band4, 20)
    return sig * mult, tol

# 示例：红红橙金 → 22 × 1000 = 22000 Ω ±5%
resistance, tolerance = four_band_resistor('red', 'red', 'orange', 'gold')
print(f"{resistance} Ω ±{tolerance}%")  # 22000 Ω ±5%

复制package main

import "fmt"

var colorMap = map[string]int{
	"black": 0, "brown": 1, "red": 2, "orange": 3, "yellow": 4,
	"green": 5, "blue": 6, "violet": 7, "gray": 8, "white": 9,
}
var multiplierMap = map[string]int{
	"black": 1, "brown": 10, "red": 100, "orange": 1000, "yellow": 10000,
	"green": 100000, "blue": 1000000, "violet": 10000000, "gray": 100000000, "white": 1000000000,
}
var toleranceMap = map[string]float64{
	"brown": 1, "red": 2, "green": 0.5, "blue": 0.25, "violet": 0.1, "gray": 0.05, "gold": 5, "silver": 10,
}

func fourBandResistor(band1, band2, band3, band4 string) (int, float64) {
	sig := colorMap[band1]*10 + colorMap[band2]
	mult := multiplierMap[band3]
	tol := toleranceMap[band4]
	return sig * mult, tol
}

func main() {
	// 红红橙金 → 22 × 1000 = 22000 Ω ±5%
	r, t := fourBandResistor("red", "red", "orange", "gold")
	fmt.Printf("%d Ω ±%.1f%%\n", r, t) // 22000 Ω ±5.0%
}

复制const COLOR_MAP = {
  black: 0, brown: 1, red: 2, orange: 3, yellow: 4,
  green: 5, blue: 6, violet: 7, gray: 8, white: 9
};
const MULTIPLIER_MAP = {
  black: 1, brown: 10, red: 100, orange: 1000, yellow: 10000,
  green: 100000, blue: 1000000, violet: 10000000, gray: 100000000, white: 1000000000
};
const TOLERANCE_MAP = {
  brown: 1, red: 2, green: 0.5, blue: 0.25, violet: 0.1, gray: 0.05, gold: 5, silver: 10
};

function fourBandResistor(band1, band2, band3, band4) {
  const sig = COLOR_MAP[band1] * 10 + COLOR_MAP[band2];
  const mult = MULTIPLIER_MAP[band3];
  const tol = TOLERANCE_MAP[band4] ?? 20;
  return { resistance: sig * mult, tolerance: tol };
}

// 红红橙金 → 22 × 1000 = 22000 Ω ±5%
const { resistance, tolerance } = fourBandResistor('red', 'red', 'orange', 'gold');
console.log(`${resistance} Ω ±${tolerance}%`); // 22000 Ω ±5%