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Design and Development of 89C51 Microcontroller Based Infrared Remote Control system


Posted by: seminar class
Created at: Wednesday 30th of March 2011 05:29:41 AM
Last Edited Or Replied at :Saturday 30th of April 2011 03:30:52 PM
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r.
Block Diagram
Circuit Diagram

• TSOP
 TSOP12.. is the standard IR remote control receiver series, supporting all major transmission codes
Pin Configuration
• Pin 1: ground
• Pin 2: output
• Pin 3: supply voltage
 Photo detector and preamplifier in one package
 TTL and CMOS compatibili
Output active low
 Low power consumption
 Lead (Pb)-free component
 Improved immunity against ambient light
Output of DSO
Digital potentiometer
 A digital potentiometer is a digitally-controlled electronic ..................[:=> Show Contents <=:]



WIRELESS CONTROLLED GREEN HOUSE AUTOMATION


Posted by: seminar class
Created at: Wednesday 09th of March 2011 05:23:56 AM
Last Edited Or Replied at :Thursday 25th of August 2011 11:36:28 PM
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ors will be connected to a microcontroller which will
function as the main control unit. The sensors will send signals to the microcontroller and
the microcontroller will translate the signals and determine if the input is within the
preset range. For instance, if the preset temperature range is from 20oC to 25oC, the
microcontroller will make sure that the greenhouse temperature is within this range. If the
temperature exceeds the maximum value, the microcontroller will then turn on the fan. If
the temperature drops below the minimum value, the heater will turn on. As for the
photodiod..................[:=> Show Contents <=:]



Green house monitoring using zigbee


Posted by: seminar class
Created at: Monday 07th of March 2011 01:30:09 AM
Last Edited Or Replied at :Monday 07th of March 2011 01:30:09 AM
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analog voltage output is given as input to the ADC. The ADC will convert the analog voltage to the 8 bit digital value. The microcontroller will calculate the temperatu..................[:=> Show Contents <=:]



HOME AUTOMATION USING MOBILE COMMUNICATION


Posted by: projectsofme
Created at: Friday 26th of November 2010 12:59:42 AM
Last Edited Or Replied at :Friday 03rd of February 2012 10:43:13 PM
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communication” has different sections such as:

1. Microcontroller
2. DTMF decoder
3. Voice recording and playback device



SPECIFICATION


1. Microcontroller

I/P Requirements
1. Operating Voltage -> 6-9Vdc ± 10%
2. Input current -> 100mA
3. Battery used -> 6V, 4.5A
O/P Requirements
1. O/P Voltage -> 6-9Vdc ± 10%
2. Ripple voltage -> 1-5%
3. Current -> 250mA

2. DTMF decoder

I/P Requir..................[:=> Show Contents <=:]



speed control of moving vechiles using speed cameras


Posted by: vasu bajaj
Created at: Sunday 28th of March 2010 07:09:29 AM
Last Edited Or Replied at :Friday 02nd of April 2010 03:14:36 AM
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i want full repor..................[:=> Show Contents <=:]



Remote control using VHF modules


Posted by: computer science crazy
Created at: Wednesday 09th of September 2009 02:01:30 AM
Last Edited Or Replied at :Wednesday 09th of September 2009 02:01:30 AM
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voltage is obtained at output pin of VG40R module. This voltage is given to bias the relay driver transistor. The relay gets activated by just pressing push-to-on micro switch on the transmitter unit. The relay remains energised as long as the switch remains pressed. When the switch is released, the relay gets deactivated. Any electrical/electronic load can be connected via N/O contacts of the relay.
To activate a relay for a preset period (refer Fig. 3), the switch on the transmitter unit is pressed momentarily. The transistor gets base bias from VG40R module. As a result the transistor con..................[:=> Show Contents <=:]



Ultrasonics and Acousto-Optics for the Nondestructive Testing of Complex Materials


Posted by: Computer Science Clay
Created at: Saturday 06th of June 2009 10:55:36 PM
Last Edited Or Replied at :Thursday 27th of August 2009 06:56:57 PM
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esting has become an essential tool for failure prevention, conditionbased maintenance, structural health monitoring, as well as for quality control during production processes. Ultrasound and Acousto-Optics are applied to examine the mechanical properties of isotropic and anisotropic materials, and also to detect material defects. Fiber reinforced composites are ubiquitous in many industries, yet the interaction of ultrasound with such materials is particularly challenging because of effects such as surface roughness, the fact that materials in principle may be triclinic instead of orthotropi..................[:=> Show Contents <=:]



Selective Catalytic Reduction SCR


Posted by: computer science crazy
Created at: Tuesday 07th of April 2009 11:58:25 AM
Last Edited Or Replied at :Tuesday 07th of April 2009 11:58:25 AM
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owned on (California) and the Zeolite type preferred, however Vanadium offers better performance.

SCR catalysts function well only within a narrow temperature window, and for OEM installations the Engine Control Unit is specially programmed to keep the exhaust gas temperature in that range..................[:=> Show Contents <=:]



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