555 square wave

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k7elp60 said:
Looking in my copy of "The 555 timer applications sourcebook" by Howard Berlin, he recommends the pull up resistor from pin 3 to Vcc and the value should be at least 1/10 the value of the resistor from pin 3 to pins 2 and 6.
Click to expand...

What does this circuit look like from your book?

thanks,
Corey
 
saturn1bguy said:
What does this circuit look like from your book?

thanks,
Corey
Click to expand...
This is the circuit diagram
 

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Roff said:
The equation is wrong. It should read
F=1/(1.386RC), or equivalently
F=0.721/RC
Click to expand...
Roff is correct, thank you Roff for keeping my diagram and post accurate.
I have corrected the post this refers to.
 
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