## Astable waveforms
Charge time (output high)
t1 = 0.693(Ra+Rb)C
Discharge time (output low)
t2 = 0.693(Rb)C
Total period
T = t1+t2 = 0.693(Ra+2Rb)C
Frequency of oscillation
f = 1/T = 1.44/(Ra+2Rb)C
## Astable waveforms
Charge time (output high)
t1 = 0.693(Ra+Rb)C
Discharge time (output low)
t2 = 0.693(Rb)C
Total period
T = t1+t2 = 0.693(Ra+2Rb)C
Frequency of oscillation
f = 1/T = 1.44/(Ra+2Rb)C