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1. Part of Made in India,
Design Innovation
Workshop,2015
A
Fresh
New
Experience
in
Project-­‐Making
and
Learning

2. PHYSICSINVESTIGATORY
PROJECTON
ORGATEUSINGDIODES

3. You
must
have
seen
two
switches
to
ac?vate
the
same
doorbell,
whether
you
push
the
switch
at
the
front
door
or
the
one
at
the
garage,
the
doorbell
will
ring.
Have
you
ever
thought
how
and
why
this
happens?
The
2-­‐input
(A
and
B)
OR
gate
using
diodes
will
help
you
understand
this
mechanism,
it
has
two
inputs
and
only
one
output
(Q).
In
this
project,
you
will
make
an
OR
gate
logic
circuit
using
two
diodes,
a
resistor,
an
LED
and
a
few
connec?ng
wires.
Two
connec?ng
wires
are
connected
to
the
p-­‐sides
of
the
diodes.
Each
connec?ng
wire
represents
the
input.
This
input
could
be
either
1
or
0,
where
1
stands
for
Vcc
(posi?ve/high
voltage)
and
0
stands
for
ground
(nega?ve/low
voltage).
To
provide
the
respec?ve
inputs,
the
truth
table
of
OR
gate
is
followed.
Input
A
Input
B Output
Q
0 0 0
0 1 1
1 0 1
1 1 1
On
providing
the
inputs,
if
the
LED
glows
this
means
output
Q
=
1
or
high.
If
the
LED
does
not
glow,
the
output
Q
=
0
or
low.
AWer
verifying
the
experimental
outputs
in
four
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
our
Project
Kit!
CoolJunk
is
India's
fastest
growing
DIY
(do-­‐it-­‐yourself)
kits
company
focused
on
project-­‐based
learning
in
science,
engineering
and
technology.
Having
20,000
users
in
India,
US,
Singapore,
Middle
East
and
New
Zealand,
the
CoolJunk
kits
are
known
for
quality,
innova?on
and
high
produc?on
value.
CoolJunk
has
been
featured
in
na?onal
and
interna?onal
journals
including
Wallstreet,
Yourstory,
Hindu
Business
Line,
NextBigWhat
and
was
tagged
as
the
coolest
Indian
start-­‐up
in
IAN
Bootcamp-­‐2011.
You
may
also
refer
to
the
video:
OR
GATE
For
more
projects
visit
our
website:
CoolJunk
Tools
and
Components
in
one
box.
Step
by
step
visual
instruc?ons
Detailed
experiment
theory
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us
on: