555 timer calculator-Monostable calculator,Astable calculator
This page covers 555 timer calculator including monostable calculator and astable calculator. In monostable mode, 555 timer calculator calculates pulse width and in astable mode, 555 timer calculator calculates frequency and period.
555 timer calculator | 555 timer monostable calculator
As mentioned this 555 timer monostable calculator is used to calculate pulse width based on R and C inputs.
EXAMPLE#1 555 timer calculator in monostable mode:
INPUTS: R = 10 KΩ , C = 47 µFarad ,
OUTPUT: Output pulse width, Tp = 0.517 sec
555 timer calculator in monostable mode formula or equations
Following equations or formulas are used for 555 timer calculator in monostable mode.
Length of output pulse or pulse width (Tp) = 1.1*R*C
The R and C are shown in the figure.
555 timer calculator | 555 timer astable calculator
As mentioned this 555 timer astable calculator is used to calculate frequency, period, high time and low time based on C, R1, R2 inputs.
EXAMPLE#2: 555 timer calculator in astable mode:
c1=100µF, R1=R2=10 Kohm
tHIGH = 1.386 sec , tLOW = 0.693 sec,
Pulse Frequency= 0.481 Hz , Pulse Period = 2.079 sec
, Duty cycle = 66.67%
555 timer calculator in astable mode formula or equations
Following equations or formulas are used for 555 timer calculator in astable mode.
tHIGH = 0.693*C1*(R1+R2)
tLOW = 0.693*C1*R2
Pulse Frequency = 1/(tHIGH + tLOW)
Pulse Period = 1/Pulse Frequency
Duty Cycle = (R1+R2)/(R1+2*R2)
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