Kindly explain this 555 Timer Circuit and its Design Equation

[moonnightingale]

Hi
I have attached the design circuit and its equations written in book

Can u tell me how the book calculated the Design Equations

Kindly also tell me about working of this Circuit

Thanks a lot

 

[dick_freebird]

They probably just ripped them off from the National databook, and I
recommend you do the same.

 

[enjunear]

Google "555 astable multivibrator" and look at a few of the websites you get back. There are MANY that talk about how the circuit works... all the way down to the nitty-gritty details about the level comparisons and current mirrors inside the 555 IC.

 

[mehtadhaval]

Message is unavailable.

 

[Hasan Malik]

555 timer is a clock provider, in fact n oscillator. it generates a constant square wave, its frequency and time period can b set through the attached RC circuit. the valus of R, C can b set through farmulae including duty cycle.
In its design its is an 8 Pin IC
you can have a useful view of

http://www.kpsec.freeuk.com/555timer.htm [OR] http://www.circuitstoday.com/555-timer


and for fast calculation just input required frequency or time period It will give U the values of R1,R2 C

http://totusterra.com/555timercalc.html

Good LUCK