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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 GGGGGGGGGGGGGG..................[:=> 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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nto equivalent analog information is called as digital to analog conversion. Such converter is also called as decoding device. There are two types of such converters – the weighted resistor DAC and the R–2R ladder DAC.
The R–2R ladder (binary ladder) is a resistive network whose output voltage is a properly weighted sum of the digital inputs. It uses resistors of only two values, the R and the 2R, as shown in the above figure.
It has four digital inputs D, C, B and A with positional values of bits as 23, 22, 21 and 20 respectively. The equivalent analog voltage is (Va) which is obtai..................[:=> 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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rs, connecting wires, soldering iron, 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.
[attach..................[:=> 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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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 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 na..................[:=> 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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vert’s amplified electrical signal to audio signal. And we get auditable audio signal output of speaker. The resistances used are of value 10kΩ except variable resistance.
A supply circuit ..................[:=> 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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ration Of 1-Sec. Pulses Spaced 5-Sec. Apart
358. uC Based Digital Panel for Vehicles
359. Home Security System
360. Staircase Light With Auto Switch-Off
361. Remote Control For Home Appliances
362. Pulse Generator
363. 3-q Dual Converter
364. Flying Saucer
365. Embedded security system (key pad & LCD).
366. Charge Monitor For 12V Rechargeable Lead-Acid Battery
367. Smart Hearing Aid
368. Flashing-Cum-Running Light
369. Prepaid Energy Meter
370. Mosfet-Based Preamplifier for FM Radio DXing
371. Friendly Charger for Mobile Phones
372. Microcontroller Based Digital Code Lock Syst..................[:=> 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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distributing RF in buildings is suggested by the recognition that every building ..................[:=> 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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y RL1, which terminates the loop on line and the 10kHz tone is also disconnected. The telephone line is thus again set free to receive normal calls.This circuit is to be connected in parallel to the telephone instrument..................[:=> Show Contents <=:]



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