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Author Question: Which formula is correct when calculating time HIGH (tHI) for an astable 555 timer output? A) tHI ... (Read 58 times)

anshika

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Which formula is correct when calculating time HIGH (tHI) for an astable 555 timer output?
 
  A) tHI = RBC(.693 ) B) tHI = RARB(.693)
  C) tHI = RA(.693 ) D) tHI = (RA + RB) C(.693)

Question 2

A 555 timer in astable operation uses two timing resistors, RA and RB. Which one is used to calculate time HIGH (tHI)?
 
  A) RA B) RB C) both RA and RB D) neither RA nor RB



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ergserg

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Answer to Question 1

D

Answer to Question 2

C




ergserg

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