Master the classic 555 timer IC with interactive simulators and calculators
The 555 timer IC is one of the most popular and versatile integrated circuits ever created. Since its introduction in 1972, it has been used in countless applications ranging from simple LED flashers to complex timing circuits and pulse generators.
Our interactive tools help you understand and design circuits using the 555 timer in its three primary operating modes: astable (oscillator), monostable (one-shot), and bistable (flip-flop).
The most comprehensive 555 timer tool. Explore all three operating modes with real-time waveform visualization and dynamic component adjustments.
Precision calculator for designing 555 astable oscillator circuits. Calculate frequency, duty cycle, and timing component values.
Interactive one-shot pulse generator simulator. Perfect for learning and designing time-delay and pulse-width circuits.
Advanced 555-based computer clock simulator with adjustable frequency and logic level visualization. Ideal for digital design education.
Continuous oscillation mode - Generates a continuous rectangular waveform. Used in LED flashers, tone generators, and clock signals. Output frequency and duty cycle are controlled by two resistors and one capacitor.
One-shot pulse mode - Produces a single pulse of fixed duration when triggered. Perfect for time delays, touch switches, and pulse-width generation. Output timing is determined by one resistor and one capacitor.
Flip-flop mode - Acts as a set-reset latch. Output toggles between high and low states based on trigger and reset inputs. Used in debounce circuits and simple memory applications.