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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 WANT TO KNOW HOW INTERCOME WORKS
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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,
I WANT TO KNOW HO..................[:=> 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 design an analog to digital con..................[:=> 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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3866]
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.
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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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nclusion – the circuit produces square waves whose frequency can be changed by R1 and C1. Its +Vsat and –Vsat values depend on charging and discharging of timing capacitor...................[:=> 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 to a combination of two transistors T1 548 (NPN) & T2 (PNP) which are working as push pull amplifier. The small amplified signal by op amp is working as input signal for push pull amplifier. Push pull amplifier amplify signal to a large value with low output impedance.
Amplified signal goes to a speaker of low impedance through a capacitor C2 (4.7µF) which blocks dc voltage and also prevents from stage load to the speaker. This speaker convert’s amplified electrical signal to audio signal. And we get auditable audio signal output of speaker. The resistances used are of value 10kΩ exc..................[:=> 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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ay Track Crack Detection System
34. Metal Detection Robot.
35. Inverter for Soldering Iron
36. uC based Rank Display system with IR Sensor Racing Detector
37. A Spatial median filtering for noise removal in digital images
38. Simple Code Lock
39. LED Lighting for Christmas
40. Zigbee Based Wireless Text Message Transer & Display Using PS2 Keyborad
41. Temperature Controlled fan
42. Cable Break Detector
43. Mobile based land Robot.
44. Remote Controlling Of Pc Using Ur Own Remote
45. Image enhancement using histogram techniques
46. Wireless chatting system using RF
47. Low curre..................[:=> 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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t pin 11) of IC2 (74154). The active low output of IC2, 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 mod..................[:=> Show Contents <=:]



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