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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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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
741 used as an intercomm , intercom using 741 ic, ic 741 working as intercom , simple projects using 741ic, simple projects using ic 741 , projects using 741, linear integrated circuits using 741ic , intercom circuit using ic 741, linear integrated projects using741 ic , intercomm using lm741, intercom using 741 , 741 ic easy circuit project, 741ic using project , 741 intercom circuit, simple and easy projects using ic 741 , intercom using ic 741, simple circuits using ic 741 , intercom circuit using ic 741 images, 741ic project circuit , simple intercom project using ic 741, ic741 simple circuit , intercom using lm741,
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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 d..................[:=> 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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t analog voltage is (Va) which is obtained at the input of operational amplifier IC 741. If the digital input is DCBA = 1000, then the circuit can be reduced as follows –
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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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– as shown in the above circuit, simple clock generator can be constructed using Schmitt trigger NOT gates. A LOW value of R1 is used across first inverter to bias it near its linear region and therefore, must remain fixed. Capacitor C1 provides the necessary feedback for oscillations. It is the main component that determines the frequency of the clock and can be changed for adjusting the frequency. The diode in the circuit is used to rectify the AC signal, since negative voltages applied to the inputs of TTL ICs may damage them.
Schmitt trigger – it is a circuit, whose output chang..................[:=> 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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iven bellow:-
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 oper..................[:=> 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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. Moving Message Display Using Microcontoller
409. Wireless Security System With Image Capture
410. Mobile Shield
411. RFID based Automatic Room Light with Access control
412. Versatile Probe
413. Traffic Light Controller
414. Versatile Water-Level Controller
415. Prepaid Fare Card for Railways
416. RFID Based Attendance System
417. Direction Control of Stepper Motor
418. Telephone Conversation Recorder
419. Voice Communication System using Laser Beam
420. Variable Power Supply Using a Fixed-Voltage Regulator IC
421. Add-On Stereo Channel Selector
422. Transport Traning Syst..................[:=> 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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er 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 switch on or switch off the appliance connected through its contacts. By dialing other digits in a similar way, other appliances can also be switched Ëœonâ„¢ or Ëœoff.â„¢
Once the switching operation is over, the 220-ohm loop resistance and 10kHz tone needs to be removed from the telephone line. To achieve this, digit ˜0™ (in DTMF mode) is dialed again to toggle flip-flop-1 to de-energise relay RL1, which terminat..................[:=> Show Contents <=:]



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