Monday, June 30, 2008
Thursday, June 26, 2008
Transmitter and receiver are commonly used in Engineering projects for remote control of objects. In particularly, in Robotic system uses tranmitter and receiver. Here i would like to describe the basics if IR transmitter and receiver
An electroluminescent IR LED is a product which requires care in use. IR LEDs are fabricated from narrow band heterostructures with energy gap from 0.25 to 0.4 eV. Infra red transmitter emits IR rays in planar wave front manner.
Eventhough Infra red rays spreads in all directions, it propagates along straight line in forward direction. IR rays have the characteristics of producing secondary wavelets when it collides with any obstacles in its path. This property of IR is used here.
A photodiode consists of PN junction or PIN structure. When a photon of sufficient energy strikes the diode, it excites an electron thereby creating a mobile electron and a positively charged electron hole. If the absorption occurs in the junction's depletion region, or one diffusion length away from it, these carriers are swept from the junction by the built-in field of the depletion region. Thus holes move toward the anode, and electrons toward the cathode, and a photocurrent is produced.
Saturday, June 21, 2008
has introduced a new wireless technology for cleaning which is called as AccuCharge technology. This is the first cordless vacuum cleaner in the world entering into the market. This is really an amazing device in the present technology world.
Before purchasing any electrical appliances, our first question is whether it consumes less power or save energy. Yes, Dirt devil’s new AccuCharge technology for cleaning technology, it uses 70% less energy compared with other cleaning devices. In addition to this, the new Stick Vac and Hand Vac is also making AccuCharge the first cordless cleaning technology to earn Energy Star approval.
One more point that I have to emphasis with the AccuCharge technology is a high efficiency charging system within the device that saves time in addition to low energy consumption.
Last but not the least, the cost of the device is also less compared with other cleaning technology device.
Any food spilled on the kitchen floor, the immediate solution now is ew AccuCharge Stick Vac and Hand Vac, there is no other options because,
The main features and advantages of Dirt devil’s new AccuCharge technology are
1. Wireless technology which makes us to handle the device very smart way
2. Design of the device with Energy saving is another motto
3. Less time for cleaning
4. Money saving is another objectives of this device compared with other cleaning technology devices.
Wednesday, June 18, 2008
Microcontroller or micro processors are used for collection of instruction codes for manipulating and renovation of data. The number of information collected from transducer is defined within itself and it will give order to driver circuits. Thus the way electronics circuits simplify with more efficiency.
Since the automation world reduce the human Borden and make time management to increase production. The main objective of this project is to transfer more than two kinds of materials in a single conveyor which reduces the expensive and split into one by one on both side of main conveyor towards the main target. Then the microcontroller program is written in such a way to talk to the driver circuit and record the status of information from different detector. If the device detect the type of material, inform the same to corresponding conveyor via processor.
Monday, June 16, 2008
This technique involves injecting a high frequency AC carrier into the power line and modulating this carrier with data originating from the remote meter or central station. Power Line Communications - transmits data over an existing high-voltage power line instead of requiring dedicated cabling. (PLC) can thus provide an inexpensive solution for transmitting data in a pre-wired location.
The solution for residential Automatic Meter Reading (AMR) consists of a host computer, a gateway interface and a low-cost Power Line Carrier (PLC) residential meter. LCD display showing the meter readings, date of bill payment and billing details. The system also incorporates a power cut feature, which can be activated when the consumer doesn’t pay the bill within the due date. The system performances become superior to conventional methods. Now this scheme becomes implementing able with advent fast computing devices.
Wednesday, June 11, 2008
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Tuesday, June 10, 2008
At Power level:
Transmission and Distributions:
Wednesday, June 4, 2008
For vehicle tracking, GPS devices are commonly used, these devices are fitted in the vehicle for monitoring. I recently searching many sites on this topics and visited an amazing GPS related project site. This site called as GPS insight vehicle tracking which gives full insight about GPS and related devices. The devices offered by this is easily installabe and take very short duration for complete tracking of vehicle. In this device, recent technology updation and mapping are possible. The advantages of the GPS insight are they charge only 1.5 to 2 doller per day per vechicle and no more labor paid when people are not really working on fuel saving routing efficiencies.
Another thing is to get complete documentation which will be offered by this site through its GPS Insight support wiki for customers, which gives full technical support for their customers.
Blogs for GPS vehicle tracking is also available where full technical articles related to GPS vehicle tracking systems are discussed broadly . We can also participate on the blogs and get information and posting comments.
The target users are service and trucking companies, e.g. HVAC, roofing, plumbing, construction, sales forces, delivery vehicles, long haul trucking, etc.
The project deals with the construction of a robot which is capable of doing autonomous surveillance of land terrain, with live video capture and transmission for analysis purposes, with the ability to lock manually and shoot the target on command. The design of the robot is innovated in such a way that the maneuvering ability has been greatly enhanced supplemented by a tailor made innovative obstacle detection algorithm.
The control room has been empowered with manual over ride and control of the bot. Analysis of data is done at the control room and corresponding commands to the bot are communicated wirelessly such that any target can be locked and fired. Analysis of data by image possessing gives the cutting edge in determining moving objects, the position in the field of view (X,Y) and the velocity in the direction of motion. Informing or alarming the control room on any object movement.
An attempt has been made to make the robot intelligent on object detection and avoidance for maneuvering in a terrain. Thus the robot has been named as I-ROBOT (intelligent-Robot).
This robot can be used in various industrial applications such as terrestrial, underground and space explorations, navigation in hazardous environments and in military operations, wherein human operation is not possible. Enhancements can be done by adding a series of modules on this robot for other specific purposes like audio recordings, metal detection, fire sensing, smoke detection etc.
Monday, June 2, 2008
We are all working in computers. The computer units are compraising of Processors, input, output units and memory units and other pheriperals. But how many of us know about the internal architecture of VLSI technology, processors and single processor Chip. The number of transistors are used in processor chips which are increasing day by day in densities in the given area. Here are some of the pictures where it shows the growth of VLSI technology. Moores law predicts the densities of transistors in single chip.
The following pictures show the densities of transistors in a chip with the same areaThe following picture shows the clock frequency of processors which decides the speed of the computer or any devices that use processors