抵抗計算機

6 ツール

電子設計のための無料オンライン抵抗計算機。オームの法則で抵抗を計算、分圧器を設計、LED電流制限抵抗を求め、プルアップ抵抗値を決定できます。

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.