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A REPORT ON
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PROJECT ASSOCIATES:
M.SIVA KAMESWARA RAO
K.L.JHANSI RANI
V.V.S.PAVAN
M.SIVA KAMESWARA RAO's TEAM
5/23/2017
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CONTENT
INTODUCTION
COMPONENTS USED
PROJECT WORKING
FURTHER
IMPROVEMENTS
M.SIVA KAMESWARA RAO's TEAM
5/23/2017
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M.SIVA KAMESWARA RAO's TEAM
5/23/2017
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Basic idea
M.SIVA KAMESWARA RAO's TEAM
5/23/2017
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The case study
So we looked for
different circuits that
would match our
purpose and studied the
working of different
circuits…………
M.SIVA KAMESWARA RAO's TEAM
5/23/2017
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The Conclusion……..
So, we made out that a
monostable multivibrator
would suffice
And we need to give the
trigger through output of a
sensor whenever needed.
(we used IR sensor here)
M.SIVA KAMESWARA RAO's TEAM
5/23/2017
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WORKING
The circuit is built around a 3-pin
IR IC receiver (Siemens SFH-506-38 or
equivalent) that can detect 38kHz burst
frequency generated by a TV remote.
Transistor T1 is configured as an
open-collector output device to drive the
buzzer
M.SIVA KAMESWARA RAO's TEAM
5/23/2017
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The output pin
of IR sensor goes low
when it detects IR light,
triggering the
monostable (1-second)
built around timer NE555.
The output of the mono
toggles the J-K flip flop,
whose Q output drives
the relay through SL100
npn transistor (T1).
M.SIVA KAMESWARA RAO's TEAM
5/23/2017
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LED2, LED3, and
LED4 are used to
display the status of
each output stage
during circuit
operation.
The circuit draws the power from voltage
regulator 7805.
M.SIVA KAMESWARA RAO's TEAM
5/23/2017
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Transistor T1 is
configured as an
open-collector
output device to
drive the buzzer
Capacitor C5 is soldered close to the IR sensor’s pins
to avoid noise and false triggering.
Capacitor C3 and resistor R3 also avoid false
triggering of m o n o s t a b l e NE555.
M.SIVA KAMESWARA RAO's TEAM
5/23/2017
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The monostable acts as a 1-second
hysteresis unit to restrict the flip-flop from
getting retriggered within one second.
M.SIVA KAMESWARA RAO's TEAM
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THE PROBLEMS………!!!
This circuit is actually a copied version of EFY’s
wireless switch.
We removed the relay part and put the buzzer.
But when operated it did not blow!!!!!!
M.SIVA KAMESWARA RAO's TEAM
5/23/2017
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Our efforts……
 But we didin’t leave it in the middle(thanks to
my team……)
 We Studied that if we remove the relay there
was a problem with ‘back currents’(we even
now don’t know what this meant!!!!) and that
speaker needs ac supply!!!!
 So we checkedout and finally built the circuit
 Now its our own project …….hurrah!!!!!
M.SIVA KAMESWARA RAO's TEAM
5/23/2017
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FINAL CIRCUIT DIAGRAM
M.SIVA KAMESWARA RAO's TEAM
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Circuit test results
When we tested the circuit, we
got very good results and the
buzzer blew off whenever the
remote was used to detect.
M.SIVA KAMESWARA RAO's TEAM
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Eaves drop
But ,as of now, we have a
small problem that IR rays are
highly directional
So we need to check out in
all directions for the
objects………….
M.SIVA KAMESWARA RAO's TEAM
5/23/2017
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Further improvements
We are further working
to incorporate BLUETOOTH
so that we can easily locate
even with a mobile phone!!!!
This may be very useful
outcome…………………
We hope a good results in our
endeavor……………….
M.SIVA KAMESWARA RAO's TEAM
5/23/2017
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Queries……………
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THANK U EVERYONE
who one way or
other helped us
through the project
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