电阻计算器

6 个工具

免费在线电阻计算器用于电子设计。使用欧姆定律计算电阻，设计分压器，查找LED限流电阻，确定上拉电阻值。

Ohm's Law Calculator

Calculate voltage, current, resistance, and power using Ohm's Law. Enter any two values to find the rest instantly.

Calculate the correct current-limiting resistor value for your LED circuit. Get power dissipation and nearest standard resistor values.

Design voltage dividers with ease. Calculate resistor values or output voltage for your circuit.

Calculate general-purpose pull-up and pull-down resistor values. Consider input thresholds and load current.

Calculate optimal I2C pull-up resistor values based on bus capacitance and speed mode. Supports Standard, Fast, and Fast Mode Plus.

Decode resistor color bands to find the value, or find color bands for a given resistance. Supports 4, 5, and 6 band resistors.