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heat sensor with fan cooling using ic 741 pdf

Posted by:
Created at: Friday 16th of November 2012 01:22:43 AM
Last Edited Or Replied at :Monday 05th of October 2015 03:53:23 AM
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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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]Procedure –
1) Identify the given components.
2) Solder the circuit using the given components.
3) Connect power supply to the circuit.
4) Measure the analog output voltage (Va) w.r.t. ground for all binary inputs from 0000 to 1111.
5) Tabulate the results in observation table.
6) Plot the graph of analog output voltage versus digital inputs.

Brief theory – 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...................[:=> 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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and C1. Its +Vsat and –Vsat values depend on charging and discharging of timing capacitor...................[:=> 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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adiating fins had to be very long because of their
poor heat radiating efficiency.
In an effort to solve this problem, Furukawa Electric has
developed the PowerKicker that enables footprint reduction
regardless of being a natural convection type, and put
it into practical application. See Photo 1.
Conventional boiling cooling system as shown in Figure 1
creates problems about global environment preservation
such as ozone depletion and global warming because its
structure is such that heat-generating components are
directly immersed in ..................[:=> Show Contents <=:]


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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IC 741 at pin 3 (non inverting input). The resistance R4 and R5 are used for biasing purpose. Positive 5 volts supply is connected to pin 7 & pin no 4 is connected to ground terminal of IC 741. Operational amplifier amplifies signal and give output at pin 6.
Operational amplifier has a feedback from pin 6 to pin 2 which inverting input through a variable resistance R1 (100kΩ) which control the gain of operational amplifier. Resistance R6 is used if variable resistance is zero then IC can be damaged due to amplified signal so a small resistance is used.
Output signal of op amp is given to a ..................[:=> 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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142. Face Recognition Based Access Control
143. Visual AC Mains Voltage Indicator
144. Electronics Burglar Alarm Using Passive Infrared Sensors
145. Sound Detection System
146. 4 Channel Blown Fuse Indicator or Multichannel Fault Indication System
147. Prototype Of RF Based Station Intimation Using Wireless Communication
148. Long Range IR Transmitter
149. 16- Bit Microprocessor Using VHDL
150. Remote-Controlled Power-Off Switch
151. 5-Band Graphic Equaliser
152. Vehice Location Reporting System
153. Dynamic Temperature Indicator Controller using uC
154. Static Rom Usi..................[:=> 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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ith 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 is..................[:=> 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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nâ„¢ and Ëœoffâ„¢ of appliances through telephone lines. It can be used to switch appliances from any distance, overcoming the limited range of infrared and radio remote controls.
The circuit described here can be used to switch up to nine appliances (corresponding to the digits 1 through 9 of the telephone key-pad). The DTMF signals on telephone instrument are used as control signals. The digit ˜0™ in DTMF mode is used to toggle between the appliance mode and normal telephone operation mode. Thus the telephone can be used to switch on or switch off the appliances also whil..................[:=> Show Contents <=:]

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