电容充电计算器
计算电容器的充电时间和电压变化过程。
Ω
%
Absolute Variation
50.00 Ω
Minimum Resistance950.00 Ω
Maximum Resistance1,050.00 Ω
Absolute Variation vs Nominal Resistance
公式
## Resistor Tolerance **R_min = R_nom x (1 - tol/100)** **R_max = R_nom x (1 + tol/100)** Common: 1% (brown), 5% (gold), 10% (silver).
计算示例
1k resistor, 5% tolerance.
- 01Variation = 1000 x 0.05 = 50 ohms
- 02Min = 950 ohms, Max = 1050 ohms
常见问题
Which tolerance to choose?
5% for general use, 1% or better for precision circuits.
Temperature effect?
Temperature coefficient (ppm/C) is separate from manufacturing tolerance.
Cost difference?
0.1% resistors cost significantly more than 5% due to extra testing.
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