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Page Name: light dependent resistor ppt download
Created at: Tuesday 02nd of April 2013 07:43:46 AM
Last Edited Or Replied at :Tuesday 02nd of April 2013 07:43:46 AM
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Posted by: project source code cheker
Created at: Tuesday 14th of August 2012 02:19:28 AM
Last Edited Or Replied at :Tuesday 14th of August 2012 02:19:28 AM
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|Experiment with Light Dependent Resistor
Introduction To Light Dependent Resistor (LDR)
In the dark, the resistance of the LDR is very high, typically around 1M ohm. In bright light it is low, typically 1K ohm. An example of the peak spectral response of the LDR (VT936G from EG&G) is 550nm. The continuous power dissipation is 80mW and the maximum voltage which can be applied to it is 100V.
The snake like track on the face of the LDR is a cadmium sulphide (CdS) film. On each side is a metal film which is c..................==> [ Click Here to Read More ]
Posted by: project report expert
Created at: Thursday 18th of August 2011 11:31:05 PM
Last Edited Or Replied at :Monday 27th of May 2013 12:26:43 AM
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|istance can fall down to value of 500 ohms. The power ratings are usually smaller and are in the
range 50mw to .5w. Though very sensitive to light, the switching time is very high and hence cannot
be used for high frequency applications. They are used in chopper amplifiers. Light dependent
resistors are available as discs 0.5cm to 2.5cm. The resistance rises to several Mega ohms under
The below figure shoes that when the torch is turned on, the resistance of the LDR falls, allowing current to pass through it is shown in figure.
Fig. 1.1: LDR. ..................==> [ Click Here to Read More ]
Page Name: LDR
Posted by: Mohsinali
Created at: Tuesday 26th of July 2011 07:23:10 AM
Last Edited Or Replied at :Tuesday 26th of July 2011 07:23:10 AM
|ldr light dependent resistor,|
|Light dependent resistor(LDR), also called as Cadmium Sulphide (CdS) cell or photoresistor is a
resistor whose value depends upon the incident light intensity. In darkness, the resistance of LDR
becomes high and in light, the resistance gets low. The resistance variation phenomenon of LDR has
been taken as a base for making circuits of LDR Engineering.|
My question is that can wee use anything instead of light dependent resistor (LDR) ??..................==> [ Click Here to Read More ]
Page Name: MAGIC EYE ALARM
Posted by: academic expert
Created at: Friday 22nd of April 2011 11:27:43 PM
Last Edited Or Replied at :Wednesday 21st of March 2012 11:36:59 PM
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If The intensity of light is less the resistance of the LDR is more
The heart of the circuit is timer IC555.
which is here acting as oscillator to generate sound whenever shadow is cast on LDR .
Timer 555 is connected to operate in astable mode of operation . Resistors R1, R2 along with capacitor C2 & C3 are required to operate the time properly.
Electronic eye circuit works as light intensity indicator.
Speaker will be activated.
We can increase the range of this equipment by using better sensor.
We can use this as ..................==> [ Click Here to Read More ]
Posted by: 10lee05
Created at: Tuesday 25th of January 2011 05:43:58 AM
Last Edited Or Replied at :Sunday 21st of August 2011 11:25:45 PM
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|I am 10lee05,|
I need complete projects details with circuit diagram for the following tipoic.
Industrial Protection System Using Light Dependent Resistor
presently i don't what is this projects will perform.
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Posted by: bharat mohan
Created at: Thursday 18th of March 2010 08:02:55 PM
Last Edited Or Replied at :Wednesday 15th of February 2012 11:24:57 PM
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Page Name: EXTRAORDINARY MAGNETO RESISTANCE
Posted by: seminar projects expert
Created at: Friday 30th of January 2009 01:20:50 PM
Last Edited Or Replied at :Friday 30th of January 2009 01:20:50 PM
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|o the disk has a limitation. This limit now a days is 13Gb/sq. inch. So the hard drive storage
density has to be limited to that extent. The storage density cannot be increased even though the
technology to do so is available because of the read head limitation. Here comes the importance of
extraordinary magnetoresistance. This property makes it possible to create hard disks of high
density storage, because by using this property it is possible create read- write heads which can
access the data from the high density storage disks which in normal case would not have been
possible. Using this pr..................==> [ Click Here to Read More ]|
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