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This excellent 555 applet kindly provided by:
PCBHeaven.com's Dr. Calculus




Calculate Frequency by parts

R1  
R2  
C  

T1    
T2    
F    
Duty cycle      
Calculate R2 by T1-T2

T1*  
T2*  
R1  
C  

F    
Duty cycle      
R2    
Calculate R1 by T1-T2

T1*  
T2*  
R2  
C  

F    
Duty cycle      
R1    
Calculate C by T1-T2

T1*  
T2*  
R1  
R2  

F    
Duty cycle      
C    

* If you want to use instead of the T1 and T2 variables the frequenct F and the Duty Cycle for your calculations, use the following form to calculate the T1 and T2 and then you can click the button 'Replace'. This button will replace the values for T1 and T2 to all above calculation forms.

F  
Duty cycle     %

T1    
T2    
 

Comments:


file: /Techref/logic/555/555astable.htm, 28KB, , updated: 2011/1/30 12:53, local time: 2022/12/2 17:58,
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