Circuit Simulator - 555 Square Wave Generator

Why 555 Square Wave Generator?

Learn about 555 Square Wave Generator to improve your skills and design your electronics projects yourself.

Where can I get 555 Square Wave Generator Circuit Diagram with Explanation?

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How to design a 555 Square Wave Generator (electronic circuit)?

You can easily design the 555 Square Wave Generator circuit by practicing the exercises given below. Here you can design and simulate your own electronic circuits with this Online Circuit Designer and Simulator.

Circuit Description:

This is a simple square wave oscillator using a 555 timer chip.

A timing interval starts when the trigger input ("tr") goes lower than 1/3 Vin, or 3.33V. When this happens, the 555 output goes high, and the 555 waits for the threshold input ("th") to reach 2/3 Vin, or 6.67V. As the capacitor charges, the threshold input slowly rises until it reaches the required level. Then, the timing interval ends, the output goes low, and the capacitor is discharged through the "dis" input.

When the capacitor is discharged enough so that the trigger reaches 3.33V, then a new timing interval begins. The end result is a square wave. -- Credits: Mr. Paul Falstad.

Srivamsi said: (Apr 12, 2013)  
Why the trigger reaches 3.33V, then a new timing interval begins?

Prashant said: (Dec 30, 2013)  
How would you interface a 0-10 Volt output sensor with an ADC with 3.3 Volt limit?

Prashant said: (Dec 30, 2013)  
Can a DC-DC converter have efficiency of over 98%? If so, how? And if not, why?

Prashant said: (Dec 30, 2013)  
What do you understand by a phased array? Describe the most common use of such a system.

Bamband Haryanto said: (Apr 14, 2014)  

I'm Bambang haryanto from indonesia with no electronic background.

I need your help to plan electronic circuit based on timer 555 IC to generate pulse 3.5v, width 100msec from input trigger 0.5v, 5 msec.

If you could help me to prepare ready for use that electronic circuit im very thankfull.

Thank you.

Muni said: (Feb 6, 2015)  
What is the maximum frequency of square wave generated by 555 timer?

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