Astable 555 Timer Calculator

Using this calculator can save you time and effort in the circuit design process. And ensure that your circuit performs as desired.

R1:R2:C:

Frequentie:Hz

Duty Cycle:

Frequency and Duty Cycle Simulation

Now you know what frequency and duty cycle you need. Fill them in below and see what your circuit can look like!

Frequency:Duty Cycle:

What is an Astable 555 Timer?

An astable 555 timer is an integrated circuit. It is used to generate a periodic signal with a certain frequency.

It is an oscillator. Which, unlike the monostable 555 timer, produces a continuous output signal.

The astable 555 timer uses 2 resistors and 1 capacitor to control the frequency and duty cycle of the output signal. One of the resistors and one of the capacitors determine the time constant of the charging and discharging of the other capacitor. The other resistor determines the charging time and the discharging time of the capacitor and thus the frequency of the output signal.

The output signal of the astable 555 timer is a square wave with a certain frequency and duty cycle. The duty cycle is the ratio of the high and low voltage time of the signal. The frequency can be adjusted by changing the values of the resistors and capacitors.

Astable 555 timers are widely used in electronic circuits to generate frequencies for applications such as pulse generation, frequency modulation, and as a time base in digital clocks.