Astable Multivibrator using Ic 555 a practical approach.

A practical Circuit Diagram and construction steps for constructing Astable Multivibrator using Ic555 on Bread Board. Duty cycle is the mathematical parameter that forms a relation between the high output (TON) and the low output (TOFF). Duty Cycle is defined as the ratio of time of HIGH output i.e., the ON time to the total time (TON+TOFF) of a cycle. Duty Cycle = TON / TON +TOFF = (R1 +R2) / (R1+2R2) If R1 = 10k Ω and R2 = 1k Ω then Duty Cycle = (10+1)/(10+2) = 0.9167 or 91.67% The duty cycle has no units as it is a ratio but can be expressed as a percentage (%). If both timing resistors, R1 and R2 are equal in value, then the output duty cycle will be 2:1 that is, 66% ON time and 33% OFF time with respect to the period. TON = 0.693(R1 + R2).C TOFF = 0.693 x R2 x C Where, R is in Ω and C in Farads. Total Time Period T = TON+TOFF = 0.693(R1+2R2).C The output frequency, ƒ is therefore given as: f = 1/T = 1.44 / (R1+2R2).C The links of my previous videos related to electronics projects are as follows :- Light Sensor Circuit   • Light Sensor circuit using Ic LM 358.   Fire Alarm Circuit using Ic LM 358.    / _kr0kd8fmv   Dark Sensor Circuits using Ic LM 358.    • Dark Sensor using Ic LM358   Monostable Multivibrator using Ic 555.    • Monostable Multivibrator using Ic555   Astable Multivibrator using Ic 555.    • Astable Multivibrator using Ic 555 a pract...   To Construct Center Tapped Full Wave Reactifire on PCB.    • Centre Tapped Full  wave Rectifier   #Multivibrator #Monostable #ElectronicsProjects #VivekKumar #NE555 #Resistors #LED