Common applications
- Filtering: RC low-pass filters block frequencies above f_c = 1/(2πRC).
- Timing: 555 timers use RC networks for delay generation.
- Debouncing: small RC absorbs switch bounce.
RC time constant calculator
τ = R × C (seconds). V_charge(t) = V × (1 − e^(−t/τ)). V_discharge(t) = V × e^(−t/τ). After 5τ the capacitor is > 99% charged or discharged.
Time constant τ
0 s
V_charge(t)
0 V
V_discharge(t)
0 V
~99% time (5τ)
0 s
Cut-off frequency
0 Hz
| Time | Charge % | Voltage |
|---|