Mailar
Newbie level 4
Hi
I have 12 V battery
and I want to use it to drive 3.3V 30mA micro I/O's
In my circuit i have 3.3v 1W Zener diod with series rsistance Rs,I am not getting stable output When i am varying my source voltage from 3.3 to 12v
And i am using these formula to calculate Rs
Imax = Watts / voltage = 1 / 3.3v = 303mA
Rs= ( Vs - Vz ) / Imax = (12 - 3.3) / 303mA = 28 ohm
can any body help me...
I have 12 V battery
and I want to use it to drive 3.3V 30mA micro I/O's
In my circuit i have 3.3v 1W Zener diod with series rsistance Rs,I am not getting stable output When i am varying my source voltage from 3.3 to 12v
And i am using these formula to calculate Rs
Imax = Watts / voltage = 1 / 3.3v = 303mA
Rs= ( Vs - Vz ) / Imax = (12 - 3.3) / 303mA = 28 ohm
can any body help me...
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