What is the formula to figure out the resistor value in a 555 timer?
M Thread Starter ///m3dave Joined Dec 8, 2009 23 Dec 9, 2009 #1 What is the formula to figure out the resistor value in a 555 timer?
SgtWookie Joined Jul 17, 2007 22,230 Dec 9, 2009 #2 It depends upon how you connect the timer up! The basic configuration for an astable multivibrator is R1, R2, and C1. Go to National Semiconductor's website: http://www.national.com and download a datasheet for the LM555.
It depends upon how you connect the timer up! The basic configuration for an astable multivibrator is R1, R2, and C1. Go to National Semiconductor's website: http://www.national.com and download a datasheet for the LM555.
M Thread Starter ///m3dave Joined Dec 8, 2009 23 Dec 9, 2009 #3 if I have a pulse generator with a 10kHz and a duty cycle of 80% and a capacitor of 0.01uf. what would the formula be for finding the resistor values?
if I have a pulse generator with a 10kHz and a duty cycle of 80% and a capacitor of 0.01uf. what would the formula be for finding the resistor values?
t06afre Joined May 11, 2009 5,934 Dec 9, 2009 #4 I am not quite sure what you mean. Please refer to the formula you plan to use.
mkbutan Joined Sep 30, 2008 299 Dec 9, 2009 #5 ///m3dave said: if I have a pulse generator with a 10kHz and a duty cycle of 80% and a capacitor of 0.01uf. what would the formula be for finding the resistor values? Click to expand... if I have a pulse generator with a 10kHz and a duty cycle of 80% i think it is an output pl ref this :- http://www.national.com/ds/LM/LM555.pdf
///m3dave said: if I have a pulse generator with a 10kHz and a duty cycle of 80% and a capacitor of 0.01uf. what would the formula be for finding the resistor values? Click to expand... if I have a pulse generator with a 10kHz and a duty cycle of 80% i think it is an output pl ref this :- http://www.national.com/ds/LM/LM555.pdf