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LM555: Asking for the LM555 schematic review.

SHH
Mastermind 31076 points
Part Number: LM555

Hi Team,
could you help review the schematic?

Ra 100 kohm
Rb 200 kohm
C 2.2 uF
D 0.4  
f 1.31 Hz
t1 0.46 sec
t2 0.30 sec


Thanks,
SHH

  • 0
    TI__Guru*** 149226 points

    SHH,

    Correct, 1.3Hz with 40% low duty cycle. Output high for 0.46s  and low for 0.30s

    As always, at the first power on will have timing capacitor start at 0V so first high time will be 1.1*300k*2.2uF =  0.726 s

    After that it will follow t2 low time and t1 high time.