Author Question: Which formula is correct when calculating time LOW (tLO) for an astable 555 timer output? A) tLO ... (Read 71 times)

genevieve1028 · **on:** Jul 28, 2018

Which formula is correct when calculating time LOW (tLO) for an astable 555 timer output?

A) tLO = RB(.693 ) B) tLO = RBC C) tLO = RARB(.693 ) D) tLO = RBC(.693)

Question 2

An astable 555 timer is designed using the following external components: RA = 2 k, RB = 6.5 k , C = .01 F. Calculate time LOW (tLO).

A) 105 sec B) 550 sec C) 45 sec D) 325 msec