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listening bug synopsis pdf


Posted by:
Created at: Saturday 20th of October 2012 11:36:20 PM
Last Edited Or Replied at :Saturday 20th of October 2012 11:36:20 PM
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I Want Synopsis Of listening bug us..................[:=> Show Contents <=:]



mini project in electronics using ic 741


Posted by:
Created at: Friday 12th of October 2012 12:54:48 PM
Last Edited Or Replied at :Friday 12th of October 2012 12:54:48 PM
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looking for mini project in elect..................[:=> Show Contents <=:]



simple circuits for intercom using 741 ic


Posted by:
Created at: Thursday 04th of October 2012 03:06:30 AM
Last Edited Or Replied at :Thursday 04th of October 2012 03:06:30 AM
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I WA..................[:=> Show Contents <=:]



analog to digital converter circuit using ic 741


Posted by:
Created at: Wednesday 03rd of October 2012 10:41:31 AM
Last Edited Or Replied at :Wednesday 03rd of October 2012 10:41:31 AM
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how to ..................[:=> 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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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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4. 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 – as shown in the above circuit, simple clock generator can be constructed using Schmitt trigger NOT gates. A LOW value of R1 is ..................[:=> 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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he output of audio amplifier.
CHAPTER 5
WORKING
5.1 Working of Audio Amplifier

The working of audio amplifier is very simple. Mike is connected to IC 741at pin 2 (inverting input) through a capacitor C1 (0.04µF) which is used to block the dc voltage and pass the audio signal to the operational amplifier. Actually this audio signal is converted into electrical signal by the condenser mike. The resistances R2 and R3 (both of 10kΩ) are working as a voltage divider circuit for operational amplifier. This zero reference voltage is connected to IC 741 at pin 3 (non inverting..................[:=> 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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er Microcontroller Based
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 con..................[:=> 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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C2, after inversion by an inverter gate of IC3 (CD4049), becomes logic 1. This is used to toggle flip-flop-1 (F/F-1) and relay RL1 is energised. Relay RL1 has two changeover contacts, RL1(a) and RL1(b). The energised RL1(a) contacts provide a 220-ohm loop across the telephone line while RL1(b) contacts inject a 10kHz tone on the line, which indicates to the caller that appliance mode has been selected. The 220-ohm loop on telephone line disconnects the ringer from the telephone line in the exchange. The line is now connected for appliance mode of operation.
If digit ˜0™ is not dialed..................[:=> Show Contents <=:]



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