Re: voltage regulator

hi guyz!how r u doin?i've a little problem with an assignment
i've got
regarding voltage regulator.
ASSIGNMENT:-
my assignment is to design a voltage regulator which gives an
output
voltage of
15 volts & a current of 350mA(mili-ampere).the components used
should
be a step-down transformer, a fullwave rectifier bridge,2
resistors(Rin,Rload ),a capacitor & a zener diode.
PROBLEM:-
the problem is that i am not able 2 adjust the zener diode
accordingly.when i use an ideal
one the current & voltage are not exact."can any one of you
tell me
the specifications of the
zener diode and the transformer.'ll be very thankful.plz help.
..
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Fun thought:
Could you cheat and shop for a regulated linear DC wallwart?
I'll guess with the above ratings maybe....$15.00 canadian...
Take the labels off and say you also learned plastic molding too
:)
Crack it open and study the design..

Design Tip:
Take a look at a zener data ***. The IV transfer is not that
of an ideal regulator.
I don't know why but I fk'n hate zeners... Everytime I try to
apply, it gets shot down on tolerance spec, drift, heat,
impedance...

D
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