Physics, asked by Izwa, 6 months ago

how does ratio RA/RB effect the duty cycle of an astable 555 timer ?

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Answered by gulnazfatma093

By decreasing the value of R2 the duty cycle increases towards 100% and by increasing R2 the duty cycle reduces towards 50%. If resistor, R2 is very large relative to resistor R1 the output frequency of the 555 astable circuit will determined by R2 x C only.

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