Digital Electronics - Multivibrators and 555 Timer - Discussion

Discussion :: Multivibrators and 555 Timer - General Questions (Q.No.13)

13. 

Determine tHI and tLO for the circuit given below.

[A]. tHI = 7.95 s, tLO = 6.24 s
[B]. tHI = 6.24 s, tLO = 7.95 s
[C]. tHI = 3.97 s, tLO = 3.21 s
[D]. tHI = 3.21 s, tLO = 3.97 s

Answer: Option A

Explanation:

No answer description available for this question.

Manju said: (Sep 7, 2011)  
High time=ln(2)*C*(Ra+Rb)
Low time=ln(2)*C*(Rb)
All values given.. just subs

Titos said: (Jul 27, 2013)  
High time = 0.693(Ra+Rb)*C.

Low time = 0.693*Rb*C.

Simply substitute with the given values.

Ravi said: (Jul 21, 2017)  
Thank you @Titos.

Adarsh said: (Jul 18, 2019)  
Thanks for explaining it.

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