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heat sensor with fan cooling using ic 741 pdf


Posted by:
Created at: Friday 16th of November 2012 01:22:43 AM
Last Edited Or Replied at :Friday 16th of November 2012 01:22:43 AM
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sandeepGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG..................[:=> Show Contents <=:]



Study the working of 4bit R2R ladder DA converter circuit


Posted by: seminar class
Created at: Friday 13th of May 2011 11:10:18 PM
Last Edited Or Replied at :Friday 13th of May 2011 11:10:18 PM
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ed in the circuit for scaling the value of output voltage.
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Study the working of Schmitt trigger inverter as square wave generator


Posted by: seminar class
Created at: Friday 13th of May 2011 10:58:03 PM
Last Edited Or Replied at :Tuesday 02nd of October 2012 02:41:37 AM
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age falls to the lower threshold voltage (–Vsat) of +0.9V, the output goes HIGH. Following figure shows how the output swings HIGH and LOW with the input threshold voltag..................[:=> Show Contents <=:]



Vertical Cooling Device Using Heat-Pipe Based on Natural Convection PowerKicker


Posted by: seminar class
Created at: Tuesday 03rd of May 2011 01:09:37 AM
Last Edited Or Replied at :Tuesday 03rd of May 2011 01:09:37 AM
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with the use of water that is a working
fluid of global-environment friendliness.
Concurrently with the development of power electronics
in late years, semiconductor power devices such as gate
turn-off (GTO) thyristors, thyristors and diodes are used in
railways' substations for power conversion of high output.
These devices require some cooling means to remove the
heat generated at the conversion.
Conventionally, boiling cooling device using CFCs or
CFC substitutes as cooling medium were generally used
in this industrial field together with heat-pipe cooling
devices of horizontal t..................[:=> Show Contents <=:]



AUDIO AMPLIFIER full report


Posted by: seminar class
Created at: Friday 22nd of April 2011 06:20:00 AM
Last Edited Or Replied at :Friday 22nd of April 2011 06:20:00 AM
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ich gives output of 5 volts then a π filter is used to filter the ripples. Ripple free dc is given to main circuit at Vcc.
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main project topics for electronics and communication


Posted by: project topics
Created at: Wednesday 29th of December 2010 05:46:28 AM
Last Edited Or Replied at :Sunday 27th of March 2011 03:37:24 AM
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ation
451. Wireless Equipment Control Using uC
452. UC Based Equipment Control using Remote Login
453. AF/RF Signal Tracer
454. Temperatures Indicator & Controller Using AT89C51
455. Pyroelectric Fire Alarm
456. 33-Volt Tunning Voltage
457. Bluetooth Based Wireless Equipment Controller
458. Anti-Theft Security For Car Audios
459. High & Low Voltage cutout
460. Auto Mains Failure Switch
461. Text Message Tx & Rx Using DTMF uC
462. Computerised Universal Timer
463. Automatic Control of Unnamed rail Gate
464. Stress Meter
465. Voice Record and Playback
466. PC Based Movin..................[:=> Show Contents <=:]



Wireless RF Distribution in Buildings using Heating and Ventilation Ducts


Posted by: projects wizhard
Created at: Thursday 29th of July 2010 08:27:45 AM
Last Edited Or Replied at :Thursday 29th of July 2010 08:27:45 AM
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e of the relatively low waveguide loss, this method may lead to more efficient RF distribution than possible with radiation through walls or the use of leaky coax. Further, the use of existing infrastructure could lead to a lower-cost system. Initial experimental results are presented that demonstrate duct-assisted propagation between nearby offices in a university building. An example method is described for obtaining efficient coupling between coax and 8”x12” rectangular duct over the 902-928 MHz ISM band.

Introduction
One of the challenges related to the installation of wi..................[:=> Show Contents <=:]



Remote control using telephone


Posted by: computer science crazy
Created at: Wednesday 09th of September 2009 02:02:38 AM
Last Edited Or Replied at :Wednesday 09th of September 2009 02:24:07 AM
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adio remote controls.
The circuit described here can be used to switch up to nine appliances (corresponding to the digits 1 through 9 of the telephone key-pad). The DTMF signals on telephone instrument are used as control signals. The digit ˜0™ in DTMF mode is used to toggle between the appliance mode and normal telephone operation mode. Thus the telephone can be used to switch on or switch off the appliances also while being used for normal conversation.
http://www.electronic-circuits-diagrams.com/remotecontrolsimages/2.gif
The circuit uses IC KT3170 (DTMF-to-BCD conver..................[:=> Show Contents <=:]



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