The IC 555 timer is a versatile integrated circuit widely used in various timing and oscillator applications. It can operate in three main modes: monostable, astable, and bistable. This calculator focuses on the monostable and astable modes.
In monostable mode, the 555 timer produces a single pulse of a specific duration when triggered. The pulse width is determined by the values of the external resistor (R) and capacitor (C).
The formula for pulse width in monostable mode is:
T = 1.1 × R × C
Where:
In astable mode, the 555 timer operates as an oscillator, producing a continuous stream of rectangular pulses. The frequency and duty cycle of the output are determined by two external resistors (R1 and R2) and one capacitor (C).
The formulas for astable mode are:
Frequency (f) = 1 / (0.693 × (R1 + 2R2) × C)
Duty Cycle = (R1 + R2) / (R1 + 2R2) × 100%
Where:
The 555 timer is used in a wide range of applications, including:
This calculator helps you quickly determine the component values or output characteristics for both monostable and astable configurations of the 555 timer, making it an invaluable tool for electronic design and analysis.
We can create a free, personalized calculator just for you!
Contact us and let's bring your idea to life.