Electronics · Circuit Math

555 Timer Calculator

Astable oscillator or monostable one-shot — set R and C, the timing solves live.

Vcc 1 kΩ 10 kΩ 10 µF 555
Frequency 6.87 Hz
R1
R2
Capacitor (C)

Ideal timing from the standard 555 equations — real parts have small propagation delays and minimum R/C limits. Check your IC's datasheet at extremes.