阻力色彩代码计算器
将4/5/6波段阻力颜色破解成一个值,或将值转换成波段。
输入结果时更新 。
关于此计算器
The resistor color code is the scheme of coloured bands painted on a resistor to show its value, used because the parts are too small to print numbers on. Reading left to right, the first bands are significant digits, the next band is a power-of-ten multiplier and the last band is the tolerance. For a 4-band part the value is (10 × digit1 + digit2) × 10^multiplier ohms; 5- and 6-band parts add a third significant digit for tighter precision (and, on 6-band parts, a temperature-coefficient band). Each colour maps to a fixed number: black 0, brown 1, red 2, orange 3, yellow 4, green 5, blue 6, violet 7, grey 8, white 9, with gold and silver serving as ×0.1 and ×0.01 multipliers or ±5% and ±10% tolerances.
As a worked example, the classic brown-black-red-gold band pattern reads as digits 1 and 0, a ×100 multiplier and ±5% tolerance: (10 + 0) × 100 = 1,000 Ω, i.e. a 1 kΩ ±5% resistor whose true value lies anywhere from 950 Ω to 1,050 Ω. Decode any part by selecting the colour of each band from the drop-downs and the calculator returns the nominal resistance, the tolerance and the guaranteed value range.
Switch to reverse (encode) mode to go the other way: type a target resistance and the tool rounds it to the nearest value the digit bands can express, chooses the multiplier to match, and lists the band colours you would read off a real resistor of that value — handy when you have a schematic value and need to find or verify the physical part on your bench.
经常问到的问题
抵抗者如何使用彩色带?
前两个(或三个)带给出了重要数字, 下一个是x10n乘数, 最后一个是耐受度。 布朗- 黑色红宝石 = 1, 0, ×100, 5% = 1 k__ × 5% 。
容忍乐队是什么意思?
容忍是真正的抵抗力可能与名义价值差得多。 1 k 的 5% 的 抵抗力可以测量到 950 年到 1050 年。
反向模式如何选择带子?
它将你的目标绕到数字带可以表达的最接近值,然后选择乘数,这样读数匹配——与你从一个真正抵抗者身上读出的相同颜色。
4、5和6波段抵抗者有什么区别?
4波段阻力器有两个数字带;5波段加第三个数字,以比较紧的容度(如 1%)为单位;6波段加一个最后温度系数带,以显示每个度值的移动。更多波段通常意味着更精确的部分。
我该先读哪个抵抗者?
开始于最接近端端的乐团,然后读到容忍带,它通常是金或银,与其余部分稍有区别。 如果金或银坐在同一端,那就是容忍带,那么从相反端阅读。
金银带是什么意思?
In the multiplier position gold means ×0.1 and silver means ×0.01, giving sub-ohm values. In the tolerance position gold means ±5% and silver means ±10% — the two most common everyday tolerances.
为什么我的抗药性不完全符合代码?
The bands give a nominal value plus a tolerance window. A ±5% 1 kΩ resistor may legitimately measure anywhere from 950 Ω to 1,050 Ω, and temperature and age can shift it further, so a small mismatch on a multimeter is completely normal.
API - 使用代码中的计算器
将此计算器称为自由 JSON 端点 。 不需要按键 。 将字段值发送到下面作为查询参数或 JSON 。 任何您省略的, 都会使用相同的默认值, 此页面预填的默认值是预填的; 未知参数是 400, 而不是静音零 。 读取 API 全部文件 →
终点
GET https://calculator.free/api/v1/resistor-color-code/curl
curl "https://calculator.free/api/v1/resistor-color-code/?mode=decode&bands=4&band1=1&band2=0&multiplier=2&tolerance=5"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/resistor-color-code/?" + new URLSearchParams({
"mode": "decode",
"bands": "4",
"band1": "1",
"band2": "0",
"multiplier": "2",
"tolerance": "5"
}));
const data = await r.json();
console.log(data.results);成果仅是一般指导的估计数,而不是财务、医疗或税务咨询。