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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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uit can be reduced as follows –

Conclusion –
1) The circuit can convert applied digital input combinations into their equivalent analog output voltages.
2) The operational amplifier is used in the circuit for scaling the value of output voltage.
..................[:=> Show Contents <=:]

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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n, cutter etc.
Circuit diagram –

Procedure –
1) You are given IC 7414. Identify the pin numbers of the IC.
2) Write the expression for the period of output waveforms. Calculate the values of R1 & C1 for three different frequencies.
3) Draw the ideal output voltage waveform of the circuit.
4) Connect the circuit with different values of R1 and C1. Observe each output on CRO and trace the waveforms.
5) Measure the periods and frequencies from CRO and compare them with theoretical results.

Brief theory ..................[:=> 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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tionally, 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 type. However, there has been a
growing requirement for a new cooling method in view of
equipment's footprint reduction as well as global environment
preservation to cope with the global warming problem
caused by ozone depletion. To make a heat-pipe
cooling system maintenance-free, it was normal practice
to employ a horizontal-cooling scheme based on natural
convection. Such a horizontal-cooling scheme, how..................[:=> 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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Audio signal (input)
Amplified audio signal (output)
3.2 Description of Block Diagram
The block diagram of audio amplifier is divided into 4 blocks
a) Input Stage (Condenser mike)
b) Operational amplifier
c) Push pull amplifier
d) Output Stage (Speaker)
First of all there is a condenser mike which is used to collect the audio signal (input signal) and to convert it into electrical signal. This electrical signal is goes to inverting input of the operational amplifier through a capacitor which is used to block the dc signal.
Second stage of audio amplifier is operational am..................[:=> 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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uipment control
69. Medium-Power FM Transmitter
70. Moblie Phone/Telephone Controlled Token Number Display
71. Car Anti-Theft Wireless Alarm
72. Electrical Equipment Control using Voice - Wired
73. Digital Audio - Video Input Selector
74. JPEG compression using DCT.
75. Triple Power Supply
76. Automatic Plant Irrigation System
77. Vehicle Pollution Alert System
78. Low cost PCO Billing meter
79. Line Follower Robot
80. Extension Phone Switcher
81. Wi-Fi Lan Controlled Robot With Robotic Arm
82. Crystal-Controlled Time-Base Generator
83. Energy Metering using GSM modem
84. Fi..................[:=> 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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on 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.

One of the challenges related to the installation of wireless networks in buildings is the need to predict RF propagation and coverage in the presence of complex combinations of shapes and materials in a building environment. In general, the attenuation in buildings is higher than in free space, requiring more cells and higher power to obtain adequate coverage. Over the past sev..................[:=> 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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œoffâ„¢ of appliances through telephone lines. It can be used to switch appliances from any distance, overcoming the limited range of infrared and radio 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 fo..................[:=> Show Contents <=:]

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