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3. A
NOT
gate
also
known
as
an
inverter
is
an
electronic
circuit
that
performs
nega9on
i.e.,
the
output
of
the
NOT
gate
is
low,
if
the
input
is
high
and
vice
versa.
Mul9plexers,
decoders,
state
machines,
and
other
sophis9cated
digital
devices
use
inverters. The
NOT
gate
has
one
only
input
(A)
and
one
output
(Q).
You
can
make
a
NOT
gate
project
and
see
how
it
inverts
the
given
input.
In
this
project,
you
will
make
an
NOT
gate
logic
circuit
using
a
transistor,
three
resistors,
an
LED
and
a
few
connec9ng
wires.
The
connec9ons
are
made
such
that,
the
emiIer
of
the
transistor
is
grounded
and
.an
input
wire
is
connected
to
the
leJ
leg
of
the
base
resistor.
This
input
could
be
either
1
or
0,
where
1
stands
for
Vcc
(posi9ve/high
voltage)
and
0
stands
for
ground
(nega9ve/low
voltage).
To
provide
the
respec9ve
inputs,
the
truth
table
of
NOT
gate
is
followed.
Input
A
Output
Q
0 1
1 0
On
providing
the
input,
if
the
LED
glows
this
means
output
Q
=
1
or
high.
If
the
LED
does
not
glow,
the
output
Q
=
0
or
low.
AJer
verifying
the
experimental
outputs
in
two
different
cases
of
the
inputs,
we
do
the
‘path
of
current’
analysis
and
reason
out
why
the
LED
glows
in
each
case.
4. Have
a
look
at
what
we
provide
in
our
Project
Kit!
CoolJunk
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For
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All
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Step
by
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Detailed
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theory
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