electronic eye1

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A Mini Project onA Mini Project on

MAGIC EYE ALARMMAGIC EYE ALARM

SubmittedSubmitted ByBy ::Deepak Singh (project head)Deepak Singh (project head)

(07(07--AEIAEI--12)12)HarishHarish ChandilaChandila (07(07--AEIAEI--15)15)LalitLalit Kumar (07Kumar (07--AEIAEI--21)21)PrakashPrakash ChandChand (07(07--AEIAEI--27)27)RucheeRuchee ChauhanChauhan (07(07--AEIAEI--36)36)



In troductio nIn troductio n

El ectro n ic eye or magic eye has much use i n thisEl ectro n ic eye or magic eye has much use i n this

electro n ic age. A lso k n ow n as magic eye. I t ca n beelectro n ic age. A lso k n ow n as magic eye. I t ca n beused as a n automatic guest i n dicator at the door, if used as a n automatic guest i n dicator at the door, if fixed at the bottom of the door e n tra n ce. O n ce it isfixed at the bottom of the door e n tra n ce. O n ce it isin sta ll ed at the door there is n o n eed to i n sta ll a ca ll in sta ll ed at the door there is n o n eed to i n sta ll a ca ll

be ll . I t ca n a lso be used at homes or i n ba n ks as abe ll . I t ca n a lso be used at homes or i n ba n ks as aburg lar a larm.burg lar a larm.



WORKING PRINCIPLE WORKING PRINCIPLE

principle of working mainly depends on theprinciple of working mainly depends on theLDR LDR

LDR is a device which has a resistance whichLDR is a device which has a resistance which varies according to the amount of light falling varies according to the amount of light falling on its surfaceon its surface



B LOCK DIAGRAMB LOCK DIAGRAM



C IR CU IT D I AG R AMC IR CU IT D I AG R AM



C OMPON E NT SC OMPON E NT S

ResistorsResistors : R1: R1 -- 2.2K 2.2K R2R2 -- 100K 100K R3R3 -- LDR LDR

CapacitorCapacitor : C1: C1 -- 0.02MFD0.02MFDC2C2--0.1MFD0.1MFD

C3C3--22MFD 12V 22MFD 12V IC : NE555 TIMER IC : NE555 TIMER Miscellaneous : Power supply Miscellaneous : Power supply

SpeakerSpeaker



LDR LDR--Light dependent resistorLight dependent resistor

valence bands

conduction band band

bandgap

CadmiumSulphide

track



LDR IC C&R WORKINGSLDR IC C&R WORKINGS

If The intensity of light is more the resistanceIf The intensity of light is more the resistanceof the LDR is lessof the LDR is lessIf The intensity of light is less the resistance of If The intensity of light is less the resistance of

the LDR is morethe LDR is more The heart of the circuit is timer IC555. The heart of the circuit is timer IC555. which is here acting as oscillator to generate which is here acting as oscillator to generatesound whenever shadow is cast on LDR .sound whenever shadow is cast on LDR . Timer 555 is connected to operate in Timer 555 is connected to operate in astableastablemode of operation . Resistors R1, R2 along withmode of operation . Resistors R1, R2 along withcapacitor C2 & C3 are required to operate thecapacitor C2 & C3 are required to operate the

time properly.time properly.



OBS ERV ATI ON&ANALYS I SOBS ERV ATI ON&ANALYS I S

Electronic eye circuit works as light intensity Electronic eye circuit works as light intensity indicator.indicator.

Speaker will be activated.Speaker will be activated.



F U T U RE SC OP EF U T U RE SC OP E

W e can increase the range of this equipmentW e can increase the range of this equipment by using better sensor. by using better sensor.

W e can use this as Remote Controller.W e can use this as Remote Controller.



MERITSMERITS

Low costLow cost

E asy to co n structE asy to co n struct

Portab lePortab le

Low power co n sumptio nLow power co n sumptio n

R ea l time app l icatio n sR ea l time app l icatio n s



DEMERITSDEMERITS

It is difficult to work with this equipment if It is difficult to work with this equipment if

there is no sufficient lighting conditions.there is no sufficient lighting conditions.

Unnecessary disturbances may occur whileUnnecessary disturbances may occur while

using in the Apartmentsusing in the Apartments



APPL I C ATI ONSAPPL I C ATI ONS

It can be used as an automatic guest indicator at theIt can be used as an automatic guest indicator at thedoor.door.

It can also be used in banks as a burglar alarm.It can also be used in banks as a burglar alarm.

Electronic Eye is a vital component in anyElectronic Eye is a vital component in anyelectric circuit which is to be turned on and off electric circuit which is to be turned on and off -- for example, solar powered garden lights,for example, solar powered garden lights,and night security lighting.and night security lighting.



An Electronic Eye can even be used in a simpleAn Electronic Eye can even be used in a simpleremote control circuit using the backlight of aremote control circuit using the backlight of amobile phone to turn on a devicemobile phone to turn on a device

Once it is installed at the door there is no need toOnce it is installed at the door there is no need toinstall a call bell.install a call bell.

Only 5V DC power supply is required for operatingOnly 5V DC power supply is required for operatingthe circuit.the circuit.



B I B I LOG R APHYB I B I LOG R APHY

www.technologystudent.com www.technologystudent.com www.projectcircuits.com www.projectcircuits.com www.talkingelectronics.com www.talkingelectronics.com

www.efy.com www.efy.comhttp://electronicdesign.comhttp://electronicdesign.com

electronic eye1

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