555 Timer Calculator


An extremely common integrated circuit used in electronic circuits to produce accurate timing signals is the 555 timer.
It is made up of transistors, resistors, flip-flops, and comparators that are combined in a particular way to create different timing functions.
The 555 timer has three main modes of operation: bistable, monostable, and astable. It can be used to create single pulses, continuous oscillations, or toggling states with flexibility.

The 555 timer’s main function in electrical circuits is to supply precise timing and control signals.
It is a dependable and economical method for producing accurate time delays, pulse-width modulation (PWM), frequency generation, and clock signals.


  • Timing Circuits
  • Pulse Generation
  • Monostable Multivibrator
  • Astable Multivibrator
  • Bistable Multivibrator

Utilize our online tool to get the 555 Timer settings using the resistance and capacitance values that the user has supplied.

By using resistance and capacitance characteristics, this 555 Timer calculator helps determine the delay and timeout times of a monostable circuit. The IC 555 timer is commonly used in monostable and stable designs, in which it detects a falling edge on the trigger pin and keeps the output voltage high for a predetermined amount of time. Timing in a monostable circuit happens only once during activation and then stops. Reactivating the circuit manually is necessary to get it going again.

Understanding 555 Timer:

Specifications: The 555 timer IC has a range of specifications, including:

Supply voltage: 4.5 to 16 V

Supply current: 3 to 6 mA (at 5 V) or 10 to 15 mA (at 15 V)

Output current: 200 mA

Maximum power dissipation: 600 mW

Operating temperature: 0 to 70°C

Derivatives: The NE555, MIC1555/7, and LMC555 are a few of the 555 timer IC versions that are available. Although the features and specs of these versions vary slightly, they all have the same fundamental functioning. 

Tips and Tricks: The following are some pointers and advice for using the 555 timer IC:

To increase stability and lessen noise, use a decoupling capacitor.

To guarantee precise timing, choose a timing capacitor that is almost equal to the required value.

When the timer is in the reset state, make sure the output is high by using a pull-up resistor.

To make sure the output is low while the timer is in the discharge state, use a pull-down resistor.

As a whole, the 555 timer integrated circuit is a popular and adaptable IC with a wide range of electronic applications. It is simple to use and may be used to make a variety of timing circuits and other electrical circuits due to its pinout and functionality. 

Note : Don’t end with comma ( , )

Resistance (R)
Capacitance (C)



where :

  • R = Resistance
  • C = Capacitance
  • T = Time Out Delay

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