555 Timer

by Andrew Clarkson

A simple electronic utility to find out resistor and capacitor values

Operating system: Windows

Publisher: Andrew Clarkson

Release : 555 Timer 4

Antivirus check: passed

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If you’re an electronic engineer or a student working with integrated circuits, you’ll need the highly efficient 555 Timer for your assistance. It is a calculator with 3 astable modes and one monostable mode that helps operate electronic oscillators. Based on the user-defined voltages, it determines the capacitor and resistor values. You can also tweak the C&R values accordingly. Thus, it saves time in manual operations.

555 Timer is an essential integrated circuit used in everyday electronic operations and implemented by various industries. Using its astable mode, you can calculate the values of two parameters or find out the value of the remaining parameter in monostable (one-shot) mode. Depending on the capacitor and frequency values, you can understand the duty cycle of square waves using the duty cycle indicator. Hence, this tool efficiently shows circuit diagrams for all modes.


  • The most popular integrated circuit with visual electronic representations to help students and electronic engineers.
  • It has 3 astable modes and one monostable mode for efficient performance. The astable or free-running mode acts as an electronic oscillator.
  • The monostable or one-shot mode operates as a pulse generator and includes bounce-free switches, frequency dividers, and measurement of resistance or capacitance.
  • You can use the duty cycle indicator to create an output. Usually, a duty cycle of less than 50%, equal to 50%, or greater than 50% is used.
  • Based on the user-defined voltage and other parameters, this calculator tool helps in finding resistance and capacitor values.
  • It works on all operating systems, including Windows 5 and above.

The advanced features of Timer 555 include a clear, user-friendly interface that shows circuit diagrams for all modes. The astable and monostable modes save time in manual operations and provide visual representations for each parameter. Above all, it has no complex system requirements and works on all operating systems, such as Windows, MacOS, and Linux. Install it on your computer to find the capacitor and resistor values within minutes.

555 Timer saves time in manual calculations by providing visual electronic representations so you can tweak capacitor and resistor values.
1. Operating system: Windows 7 or higher
2. Requires 2 GB of RAM or more
3. Graphic card supporting OpenGL 2.0 or later
4. Hard disk space: 100 MB or more

Easy-to-use interface simplifies circuit design.
Real-time simulation offers immediate circuit behavior visualization.
Extensive component library maximizes circuit design flexibility.

Limited to circuits using 555 timers only.
Lacks advanced circuit analysis features.
No support function for troubleshooting issues.
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