555 timer

Võnkeprioodi sagedus ei sõltu toitepingest.

Võnkeperiood:

$t=0639\cdot({R_1}+{2}\cdot{R_2})\cdot{C}$

Võnkesagedus:

$f=\frac{1.44}{({R_1}+{2}\cdot{R_2})\cdot{C}}$

$t_High=0639\cdot({R_1}+{R_2})\cdot{C}$

$t_Low=0639\cdot({R_2}\cdot{C}$

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