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heat sensor with fan cooling using ic 741 pdf


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Created at: Friday 16th of November 2012 01:22:43 AM
Last Edited Or Replied at :Friday 16th of November 2012 01:22:43 AM
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GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG..................[:=> 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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y – the process of translation of digital information into equivalent analog information is called as digital to analog conversion. Such converter is 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 respe..................[:=> 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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e 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 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 c..................[:=> Show Contents <=:]



Vertical Cooling Device Using Heat-Pipe Based on Natural Convection PowerKicker


Posted by: seminar class
Created at: Tuesday 03rd of May 2011 01:09:37 AM
Last Edited Or Replied at :Tuesday 03rd of May 2011 01:09:37 AM
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global
environments into consideration due to the use of deionized
water as a working fluid. The heat-pipe is known for
its high thermal conductivity

Download full report
http://www.furukawa.co.jp/review/fr022/fr22_18.pdf..................[:=> 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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r 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 signal is converted into electrical signal by the condenser mike. The resistances R2 and R3 (both of 10kΩ) are working as a voltage divide..................[:=> 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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Preventer
214. IC Controlled Emergency Light With Charger
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 D..................[:=> Show Contents <=:]



Wireless RF Distribution in Buildings using Heating and Ventilation Ducts


Posted by: projects wizhard
Created at: Thursday 29th of July 2010 08:27:45 AM
Last Edited Or Replied at :Thursday 29th of July 2010 08:27:45 AM
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With more than 100 access points, it is believed to be the largest local area network (LAN) installation anywhere. The effort required to provide a detailed description of the geometry and material composition of buildings on such a scale often causes system designers to resort to trial-and-error layouts. An alternative to relying on direct propagation throughout a building is to install leaky coaxial cable. Although this method lends itself to a systematic design procedure, the cost of the coax and its installation may be prohibitive. An alternative method of distributing RF in buildings ..................[:=> 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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¢ 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 Ëœ1â„¢ is dialed, it is decoded by IC1 and its output is Ëœ0001â„¢. 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 state. The flip-flop output is used to drive a relay (RL2) which can switch on or switch off the applian..................[:=> Show Contents <=:]



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