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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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I ..................[:=> 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
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,
I WANT TO KNOW HOW INTERCOME..................[:=> 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..................[:=> 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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s 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 obtained at the input of operational amplifier IC 741. If the digital input is DCBA = 1000, then t..................[:=> 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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s 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 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 in..................[:=> 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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.e. 20Hz to 200 kHz and amplifies that frequency signal.”
Audio amplifier works with some basic components of electronics these are microphone, operational amplifier, transistors & speaker. The microphone collects the audio signal and converts it into the electrical signal. This electrical signal is used by summing operational amplifier. This is used to eliminate the noise by comparing it with a reference voltage level. Push pull amplifier is used to amplify the final signal. Two transistors one NPN & other PNP type transistor is used in this configuration. This amplify signal converted ba..................[:=> 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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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. Fire Fighting Robot with Fan as Extinguisher
85. Car Anti-theft Guard
86. Number Guessing Game
87. PC Based Single Channel Data Acquisition
88. Precison 1Hz Clock Generator Using Chip-On-Board
89. Anti-Bag-Snatching Alarm
90. Ground Pentrating Radar
91. Darkroom Timer
92. Prepaid Fare Card for RTC Buses
93. Solar Lighting System
94. DC Circu..................[:=> 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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one line in the exchange. The line is now connected for appliance mode 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 ..................[:=> Show Contents <=:]



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