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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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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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gital input combinations into their equivalent analog output voltages.
2) The operational amplifier is used 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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discharging of timing capacitor...................[:=> 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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poor heat radiating efficiency.
In an effort to solve this problem, Furukawa Electric has
developed the PowerKicker that enables footprint reduction
regardless of being a natural convection type, and put
it into practical application. See Photo 1.
Conventional boiling cooling system as shown in Figure 1
creates problems about global environment preservation
such as ozone depletion and global warming because its
structure is such that heat-generating components are
directly immersed in an electrical-insulating cooling medium
such as ..................[:=> Show Contents <=:]


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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al amplifier is connected to +Vcc (+5volts) & pin 4 is connected to –Vcc (zero volt).
Then we are using the push pull amplifier which is used to amplify the output signal of operational amplifier which is nothing but the input audio signal. We are using push pull amplifier because the output impedance of push pull amplifier is match able with the low voltage speaker. We get the amplified signal at the output of push pull amplifier then this amplified electrical signal is converted back into the audio signal. This is the basic introduction of simple audio amplifier.
The variable resistanc..................[:=> Show Contents <=:]

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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52. Visitor Counter Cum DISPLAY System Using IR With 7 Segment LEDs
53. Little Door Guard
54. Musical 'Touch' Bell
55. Fire Monitoring System
56. Hourly Chime Function Generator
57. Automatic Dual Output display
58. UPS for Cordless Telephones
59. Muscular Stimulator
60. Communication Between two PC's Using Laser or IR
61. Wireless Electronic Notice Board
62. Smart Cellphone Holder
63. Industrial security system.
64. Blown Fuse Indicator
65. Project Name
66. Digital Timer Enhancement
67. Fire Alarm Using Thermistor
68. Internet based Equipment control
69. Medium-..................[:=> 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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An alternative method of distributing RF in buildings is proposed in which the heating and ventilation ducts are used as waveguides. Because 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 ..................[:=> 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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de of operation.
If digit ˜0™ is not dialed (in DTMF) after establishing the call, the ring continues and the telephone can be used for normal conversation. After selection of the appliance mode of operation, if digit ˜1™ is dialed, it is decoded by IC1 and its output is ˜0001™. This BCD code is then demultiplexed by 4-to-16-line demultiplexer IC2 whose corresponding output, after inversion by a CD4049 inverter gate, goes to logic 1 state. This pulse toggles the corresponding flip-flop to alternate state. The flip-flop output is used to drive a relay (RL2) which can..................[:=> Show Contents <=:]

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