RECTIFIE OR GATE

1. 2019-20
[Type the company name]
4/1/2019
TOPIC:-Rectified ‘OR’ Gate.
JAYPEE VIDYA MANDIR.
Submitted to:-
Mr.Sachin
kumar kaushik
Submitted by:-
Ritik Chauhan.

2. This is to certify that the projectfile
“Rectified OR gate”
is a bonafide record of experiment done by
Mr. RITIK CHAUHAN
student of class 12th of
JAYPEE VIDYA MANDIR, CHANDPUR.
Under the guidance of
Mr. SACHIN KUMAR KAUSHIK.
during session 2019-2020.
(Mr. RAJEEV SHARMA) (Mr. SACHIN KUMAR KAUSHIK)
Signature of Principal. Signature of Subject Teacher.
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3. I would like to express my deep sense of thanks and gratitude to
Mr. SACHIN KUMAR KAUSHIK ,PGT physics for guiding me
through this valuable project file and for giving important suggestions
which helped me in completing this project file in time.
I would also like to thanks all the teaching and non-teaching staff of
physics department who helped me directly or indirectly in completion
of this project file.
Finally , yet importantly ,I would like to express my grateful thanks to
my beloved parents for their blessings ,motivation and support. I must
thanks to my classmates for their timely help and support for
compilation of this project file.
Last I would like to thanks all those who interestingly help me in
completion of this project file directly or indirectly.
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4. S. No Contents Page
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AIM.
Introduction.
Symbols of OR Gate.
Apparatus required.
Principle.
Circuit Diagram.
Working.
Observations and conclusions.
Uses.
Bibliography.
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5. 1.To convert the 220 V AC power supply to 12V
DC power supply using step-down transformer
and rectification.
2. To design and stimulate the “OR Gate.”
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6. GATE:- A gate is defined as a digital circuit which follows some logical
relationships between the input and output voltages.It is a digital
circuit which either allows a signal to pass through or stop it.
The logic gate are building blocks at digital electronics . They are
used in digital electronics to change one voltage level into another
according to some logic statement relating to them.
TRUTH TABLE:- A LOGIC gate may have one or more than one inputs
,but it has only one output .The relationship between the possible
values of input and output voltage are expressed in the form of a
table called truth table.
Truth table of a logic gate is a table that shows all inputs and
outputs that are possible for the logic gates.
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7. There are two symbols of OR gates:
• The American (ANSI or 'military') symbol.
• The IEC ('European' or 'rectangular') symbol.
• The deprecated DIN symbol.
MIL/ANSI Symbol IEC SYMBOL
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DIN SYMBOL

8. ➢ Step- Down transformer.
➢ Diodes.
➢ Capacitors
➢ Connecting wires.
➢ Two switches.
➢ One led bulb.
➢ Bread board.
➢ Fuse.
➢ 7805 transistor.
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9. Any Boolean algebraic operation can be associated with the
input and output,which represents the statement of Boolean
algebra. Although these circuits may be complex , they may all
be constructed from three basic devices like a P-N junction
diode, a resistance and an N-P-N transistor.
LOGICAL STATEMENTS
1 0
High Low
Positive Negative
On Off
Close Open
Conducting Non conducting
Yes No
True False
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11. ▪ The first stage of circuit is stepdown transformer
which converts the 220 V AC into 12 V AC .
▪ The next stage is the Diode-bridge wave rectifier
which uses four or more diodes to converts the
12V AC into 12 V DC.
▪ Then the supply is passed through the filter
circuit containing capacitor to stop the AC
component if present and thus we obtain a
smooth DC.
▪ After this the supply is given to the 7805 type
transistor to regulate the potential across the
supply.
▪ Now we obtain DC with no AC components and
with constant potential .

12. Truth Table of OR Gate:-
The working of OR gate can be explained on basis of following
TRUTH Table. :-
INPUTS OUTPUTS
A B X
0 0 0
0 1 1
1 0 1
1 1 1
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13. The following conclusions can be drawn from circuit:-
➢If both A and B is ‘ON’ (i.e. A=1 & B=1) then
bulb will glow (i.e. P=1).
➢If A is ‘ON’ and B is ‘OFF’ (i.e. A=1 & B=0)
then bulb will glow (i.e. P=1).
➢If A is ‘OFF’ and B is ‘ON ’ (i.e. A=0 & B=1)
then bulb will glow (i.e. P=1).
➢If both A and B is ‘OFF’(i.e. A=0 & B=0) then
bulb will not glow (i.e. P=0).
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14. Or gates is used in following Places:-
➢ Logic gates are used as building blocks of digital electronics.
➢ Wherever the occurrence of any one or more than one event is
needed to be detected or some actions are to be taken after their
occurrence, in all those cases OR gates can be used. Suppose in an
industrial plant if one or more than one parameter exceeds the
safe value, some protective measure is needed to be done. In that
case OR gate is used.
➢ An OR Gate is used for circuits where multiple power sources can
power the same thing, such as 3 buttons placed around a house
that causes a piston to seal the entrance or open a door when
pressed.
➢ “Alarm circuit for car door system”:-
When any one or more doors are opened, then the output of the 4-
input OR gate is 1, then the alarm rings. So that we can know
the condition of doors, whether they are properly closed or not.
➢ And many more.
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15. 1. http://www.google.com/
2.http://en.wikipedia.org
3.www.slideshare.com
4.www.scribd.com
5.My cbseguide app.
6.Physics NCERT textbook.
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