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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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ransmitting section.
 The receiving section consists of an Infrared remote.
 In this project I’m using a Sony Infrared remote.
 Whenever a key is pressed on the remote a coded pulse train is emitted. The pattern of the pulse train depends on the key pressed.
 The transmitting section consists of the 89c2051 microcontroller.
 The microcontroller is programmed so as to decode the incoming coded pulse train which is sensed by an infrared sensor (TSOP1238).
 Once the coded pulse train is received it is decoded to recognize the corresponding amplifier for which the key..................[:=> Show Contents <=:]


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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signals from the sensors
and turn on or off the necessary devices to maintain the greenhouse at the preset levels.
The Microsemi Light Detector (LX1972) will be used. After the sensor detects the
lighting conditions, it sends a signal to the microcontroller. The microcontroller analyzes
this signal and will then turn on or off the bulb
The Microchip Thermistor (MCP9700A) or LM35 will be used as it is capable of
detecting temperatures from -40°C to 125°C. This device is suitable as surrounding
temperatures..................[:=> 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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areas, including industrial process monitoring and control, machine health monitoring, environment and habitat monitoring, healthcare applications, home automation, and traffic control.
Zigbee is a wireless network protocol specifically designed for low data rate sensors and control networks . While other wireless standards are concerned with exchanging large amounts of data, Zigbee is for devices that have smaller throughout needs. The other driving factors are low cost, high reliability, high security, low battery usage, simplicity and interoperability with other Zigbee devices. Compared..................[:=> Show Contents <=:]


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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Here is a circuit that lets you operate your home appliances like lights and water pump from your office or any other remote place. So if you forgot to switch off the lights or other appliances while going out, it helps you to turn off the appliance with your cell phone. Your cell phone works as remote control to your home appliances. You can control the desired appliance by presetting the corresponding key. The system also gives you voice a..................[:=> 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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..................[:=> 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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(a) activate a relay momentarily,
(b) activate a relay for a preset period,
(c) switch on and switch off a load.
To activate a relay momentarily (see Fig. 2), the switch on the transmitter unit is pressed, and so a positive 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 deactivate..................[:=> 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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nteraction 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 orthotropic, the presence of a pre-stress, piezoelectric effects, the existence of a coating, the finite dimensions of material parts, etc. Some important recent results will be presented. The presentation will focus on the interaction of ultrasound with multi-layered fiber reinforced composites and crystals, the propagation of ultrasound in piezoelectric materials that are subject to a pre-stress, and diffractio..................[:=> 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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arrow 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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