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RC time constant

Calculate RC time using resistor and capacitor.

Inputs

Ω
µF

Result

Time
1s

How it works

Where it is used

RC circuits are used in filters, simple timers, signal control and delay effects in electronics projects.

The math

The time constant is calculated by multiplying resistance by capacitance. After one time constant the capacitor reaches about 63% of its final voltage.

Formula

t = R × C

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