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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 using iC 741[/fon..................[:=> 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 proj..................[:=> 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 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 to design an analog to digital..................[:=> 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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d 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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e Hysteresis symbol on its logic symbol. For the Schmitt trigger inverter, when the input voltage reaches the upper threshold voltage (+Vsat) of +1.7V the output goes LOW. When the input voltage falls to the lower threshold voltage (–Vsat) of +0.9V, the output goes HIGH. Following figure shows how the output swings HIGH and LOW with the input threshold voltages and constitutes a Hysteresis loop of curve –

Conclusion – the circuit produces square waves whose frequency can be changed by R1 and C1. Its +Vsat and –Vsat values depend on charging and discharging o..................[:=> 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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gnal is goes to the output stage.
Last stage of amplifier is low impedance speaker whose impedance is matched with the push pull amplifier and maximum power of the amplified signal can be transferred. The amplified auditable signal comes out from the 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 s..................[:=> 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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arger
215. Wireless Switch
216. uC Based Elevator
217. Phone BroadCaster
218. PC Based Stepper Motor SPEED Control.
219. Transformer Protection from Over load and Monitoring of load current in PC
220. Water-Level Indicator Using 7-segment display
221. Parallel telephone with Secrecy
222. Wireless data communication using RF.
223. Moving Message Display Using LCD (20x4)
224. Bottle Filling System
225. Servo Stabilizer using Mirocontroller
226. Communication.
227. Low Cost Automatic Gate LIght With A Musical Bell
228. Simple Digital Security System
229. Solar Lighting System
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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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e 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 terminates the loop on line and the 10kHz tone is..................[:=> Show Contents <=:]



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