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Motion Sensors


Posted by: seminar class
Created at: Thursday 31st of March 2011 04:30:21 AM
Last Edited Or Replied at :Thursday 31st of March 2011 04:30:21 AM
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s is a standard behavior of ‘PIR’ type sensors.
Common types of the PIR sensor
1. Hawkeye
 Quite small, it is cheap(often a freebie), it can be very useful.
 A very good indicators of ‘someone walking thru the doorway’.
2. DM10A
 It is much larger than the Hawkeye, and not very attractive.
 It does however have larger batteries, and better range of ‘field’, as well as transmitter distance.
 It never sends an OFF command, but does send an ON command every 25 seconds or so as long as motion continues.
 Example: Area Sensor
 An outdoor motion sen..................[:=> Show Contents <=:]



interfacing pir sensor with microcontroller


Posted by: subramanian ramasamy
Created at: Thursday 11th of February 2010 03:22:12 AM
Last Edited Or Replied at :Wednesday 28th of November 2012 01:49:16 AM
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i am onto a project involving car theft contol could anyone help me out in knowing how to interface a pir sensor with..................[:=> Show Contents <=:]



visnav full report


Posted by: computer science technology
Created at: Friday 22nd of January 2010 04:38:28 AM
Last Edited Or Replied at :Monday 30th of January 2012 12:04:36 AM
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Aj,k is the peak amplitude of the current generator at the kth terminal of the PSD corresponding to a light beam from jth beacon driven by a sinusoidal oscillator of frequency fj while the beacon is fixed with respect to the PSD sensor, mj,k(t) is the signal due to the relative movement of the sensor with respect to the jth beacon, and nj,k is the noise component due to the jth beacon at the kth terminal.
It is required to demodulate the above composite currents in real time for N*4 channels. The components to be recovered can thus be modeled as

rj,k(t)=Aj,k(1+mj,k(t)),j=1,2,3,........................[:=> Show Contents <=:]



M-voting full report


Posted by: computer science technology
Created at: Tuesday 19th of January 2010 12:07:11 PM
Last Edited Or Replied at :Tuesday 16th of August 2011 12:15:05 AM
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¢ SMS @ 0.50 Re.
¢ Purchase of greeting cards slashed with SMS greetings
¢ OPTIONS:

SMS greet
SMS Chat
SMS Advertisement
SMS order etc.,
The secrecy of data transferred can be highly strengthened by sending encrypted, cryptographic messages. With the advent of MMS (Multimedia Messaging Services) the process becomes easier with advanced features.

Let us look for it ¦¦
PROCESS CHART:
Pros and Cons:
Pros:

Cost effective i.e. no need for dedicated voting machines, which are vulnerable and used once in five years.
User-friendly easy access for citizen..................[:=> Show Contents <=:]



ieee electrical projects


Posted by: electronics seminars
Created at: Monday 04th of January 2010 05:27:55 AM
Last Edited Or Replied at :Friday 03rd of February 2012 12:30:30 AM
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NBLC Ferreting out peripatic Device using GSM TEchnology
gggg. NBLC Accident Identification using GPS & Rf based information Sending System using GSM
hhhh. NBLC Train collision Detection using GPS & Wireless Communication
iiii. NBLC Device Control using SMS
jjjj. NBLC GSM based Motor Speed COntrol
kkkk. NBLC Vehicle theft tracking using GPS & GSM
llll. NBLC Live Human Detection Using GSM technique
mmmm. NBLC Iive Human Detection & Tracking Using GPS & Send SMS to GSM mobile Phone
nnnn. TECHNOLOGY : atmel
oooo. NBLC High Protection ATM System with Finger Print identification technology..................[:=> Show Contents <=:]



Micro-fabricated Bio-sensors


Posted by: seminar projects crazy
Created at: Monday 26th of January 2009 10:53:30 PM
Last Edited Or Replied at :Monday 26th of January 2009 10:53:30 PM
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..................[:=> Show Contents <=:]



Active pixel sensor


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:33:51 PM
Last Edited Or Replied at :Sunday 21st of September 2008 12:33:51 PM
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called 4T cell.

The JFET photogate or pinned photodiode was originally used in interline transfer CCDs due to its low dark current and good blue response, and when coupled with the transfer gate, allows complete charge transfer from the photodetector eliminating lag. The use of intrapixel charge transfer can offer lower noise by enabling the use of correlated double sampling.

The Noble 3T pixel is still often used since the fabrication requirements are easier. One transistor, Mrst, acts as a switch to reset the device. When this transistor is turned on, the photodiode is effectively conn..................[:=> Show Contents <=:]



mass airflow sensor


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 12:05:08 PM
Last Edited Or Replied at :Sunday 07th of July 2013 01:12:32 AM
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ermined.

Both approaches are used almost exclusively on gasoline burning, EFI (electronic fuel injection) engines. Both sensor designs output a 0 - 5.0 volt signal that is proportional to the air mass flow rate, and both sensors have an IAT sensor (intake air temperature) incorporated into their housings.

When a MAF is used in conjunction with an exhaust gas oxygen sensor, the engine's air/fuel ratio can be controlled very accurately. The MAF sensor provides the open-loop predicted air flow information (the measured air flow) to the engine's ECU, and the EGO sensor provides closed-loop f..................[:=> Show Contents <=:]



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