THEORY AND CIRCUIT DIAGRAM
Circuit Diagram of Electronic Eye
Electronic eye has much use in this electronic age. Also Known as magic eye. It can be used as an automatic guest indicator at the door, If fitted on the bottom of the door entrance. Once it is installed at the door there is no need to install a call bell. It can also be used at homes or in banks as a burglar alarm.
Fix the LDR to the wooden door or a locker to be protected in such a manner that when anybody tries to open it, a shadow falls on the LDR and the circuit gets activated and produce a pleasant sound through the buzzer.
This electronic eye circuit uses NOT gate from CMOS I.C
CD 4049. CD 4049 contains 6 independent NOT gate in one package; we have used here (a) one only. NOT gate output goes high(1) when the input pin 3 is at lower then 1/3rd level of the supply voltage. Conversely the output goes low (0) when it is above 1/3rd level. So small change in the voltage of pin-2 is enough to change the level of output (pin-3) from 1 to 0 and 0 to 1. The output has only two states high and low and can not remain in any intermediate stage. It is powered by a 9V battery for portable use. The circuit is economic in power consumption. Pin 1 is connected to the positive supply and pin 8 is grounded.
To detect the present of an object we have used LDR and a source of light. LDR is a special type of resistance whose value depends on the brightness of the light which is falling on it. It has resistance of about 1 mega ohm when in total darkness, but a resistance of only about 5k ohms when brightness illuminated. It responds to a large part of light spectrum.
We have made a potential divider circuit with LDR and 220 KΩ resistance connected in series. We know that voltage is directly proportional to conductance so more voltage we will get from this divider when LDR is getting light and low voltage in darkness. This divided voltage is given to input of NOT gate.
As soon as LDR gets dark the voltage of input not gate drops 1/3rd of the supply voltage and pin 2 gets high and LED or buzzer which is connected to the output gets activated.
Advantage of using Logic gate is that data can be easily send to other digital interface device.
one can easily fed data to computer using parallel port or for further processing .
Working as an auror, in combat against evil wizards. That's where he lost his leg, too.
simply in construction we just have to consider the eye piece and objective lens.The objective lens iz that lens of reflected beam of light froom the object or specimen[ordinary light].its focal length iz small.the reflected ray then passes through the eyepiece of large focal length which then iz reflacted by our eye and we see that object or spcimen. so its construction includes only the two lenses.it can be best explained 2 u by the RAY DIAGRAM.
In the original 1900 book edition of The Wizard of Oz, the text describes the Wicked Witch of the West as having only oneeye. But the illustrations show her with a working eye, and an eye patch where the other eye should be. In the beloved 1939 film version, the Witch is shown with two normal, sighted eyes.
Because it has eye shaped dome pods, which gives you a bird's eye view of London as they turn.
An eye is an eye
Eye of the Hurricane - The Alarm album - was created in 2000.
for protect roobers
Albert Einstien
The cast of Electronic Eye - 2000 includes: Demesa Denson as Spy Kyle Whitman as Watcher
A person with an electronic eye(s)
protect bank money from roober
Working Class - 2011 Eye for an Eye 1-4 was released on: USA: 11 February 2011
protect bank money from roober
I have seen several of the new electronic billboards on display. They are very eye catching and a good advertising tool.
You will not to be able to see out of your eye at the color will soon turn gray or you could get a replacement eye.
Formula for working out height of a tree is (distance from eye to base of tree/distance from eye to base of stick) x length of stick = tree height.(distance from eye to base of tree/distance from eye to base of stick) x length of stick = tree height is the formula for working out height of a tree.
more than 2 million working parts