Quickly design and analyze your 555 Timer astable multivibrator circuit with our intuitive calculator. Accurately determine the output frequency, period, and duty cycle based on your resistor (R1, R2) and capacitor (C1) values. Perfect for optimizing your oscillator for various electronic applications and understanding circuit behavior.
Formula:
The core formulas for a 555 Timer in astable mode are:
- Frequency (f):
f = 1 / (0.693 * C1 * (R1 + 2 * R2)) - Period (T):
T = 0.693 * C1 * (R1 + 2 * R2) - Duty Cycle (%):
Duty Cycle = ((R1 + R2) / (R1 + 2 * R2)) * 100
Where:
- f = Output frequency in Hertz (Hz)
- T = Period in seconds (s)
- R1 = Resistor value between VCC and pin 7 (Discharge) in Ohms (Ω)
- R2 = Resistor value between pin 7 (Discharge) and pin 6 (Threshold) in Ohms (Ω)
- C1 = Capacitor value between pin 2 (Trigger) and Ground in Farads (F)