555 Timer Astable Circuit Calculator
The 555 Timer Astable Circuit Calculator calculates the output frequency, duty cycle, high time and low time of the 555 multivibrator circuit. An astable multivibrator is a type of oscillator circuit that generates a continuous square wave output signal. It continuously oscillates between two unstable states without any external triggering. The 555 timer astable circuit is commonly used in synchronous circuits, LED flashers, tone generators, and other applications where a periodic pulse is required.
Enter the value of Resistor R1, Resistor R2 and Capacitance C
Result
Frequency
Hz
Duty Cycle
%
Time High
s
Time Low
s
The circuit consists of two external resistors and a capacitor connected to the 555 timer IC. The threshold and trigger pins are connected, and the discharge pin is connected between the two external resistors. The control pin can be used to change the threshold reference voltage. The frequency of the output waveform can be adjusted by changing the values of the resistors and capacitors connected to the IC. The duty cycle, which is the ratio of the high time to the total period, can be adjusted by selecting appropriate resistor values.
Example: For an astable multivibrator circuit with resistors 10 kΩ and 12 kΩ and capacitance of 10µF, calculate the output frequency, duty cycle of output, high time and low time of output.
