Friday, February 4, 2011

CrazyEngineers Forum

CrazyEngineers Forum

hydrogen-cooled generator

Posted: 04 Feb 2011 11:54 AM PST

Hi,
Can someone help me in this matter:

I would like to know if it is possible to use air instead of hydrogen in a hydrogen-cooled generator. If it is possible, what would be the conditions to do it. If not please justify your answer (e.g. safety reasons, efficiency, what can go wrong, etc.)

Thanks

Servo control with Sine cosine potentiometers.

Posted: 04 Feb 2011 10:22 AM PST

I have controller and motorized rotating device. The Controller is a knob the User can rotate. The rotating device is Propulsion Nozzle. Both the Controller and the Nozzle can be rotated over full 360 degrees – no limits. Both Controller and device are equipped with Sine Cosine Potentiometers.

I need the Nozzle to follow the Knob. In order to do that I need to compare output signals from the two sine cosine potentiometers and generate error signal. Error signal activate the motor and make the nozzle turn to follow the controller.

I am looking for simple (and preferably analog) way to compare outputs of the two Sine Cosine Potentiometers and generate error signal.

I expect there should be analog way to do it because the sine cosine pots were around before digital techniques came to being.

How Should We Attract More Working Engineers To CrazyEngineers?

Posted: 04 Feb 2011 10:13 AM PST

At present, the split of engineering students and professional engineers visiting CE is roughly about 60:40. Ideally, I'd like it to be about 50:50. The more professional engineers come on CE and interact with each other, the more will be the overall value created on CE. It'll not only help students learn and interact with their seniors working in the industry and also help the professionals be in touch with their engineering base.

One way to do it, I believe is to address questions/problems/issues faced by working professionals. Also create a place on CE for them to shake hands with each other and discuss stuff they'd like to.

I welcome ideas from all of you on going forward with this and how/what to do.

help for Home automation using sms project

Posted: 04 Feb 2011 05:29 AM PST

i want a help about how to connect a mobile to microcontroller and which mobile to use, how to send and receive sms showing the status of home appliances like light , fan etc.which cables to use.and complete procedure how to connect to microcontroller.and which commands are used for this.and a circuit diagram showing this.

help for Home automation using sms

Posted: 04 Feb 2011 05:24 AM PST

i need help about how to connect a mobile to a microcontroller and which mobile we can use,and how to send an sms and recieve sms showing the feedback to switch on or off home appliances like light , fan etc.i need a complete detail about which cables to use and procedure to connect to microcontroller.

UMMATECH: Online Store For Robotics & Electronics Enthusiasts

Posted: 04 Feb 2011 05:06 AM PST

Now buying Microcontrollers, wireless, sensors and motors and other stuff for your robotics and electronic project needs is even easier. I'm happy to announce that our moderator CEan Ash and his team have launched an online store for all of you -

Check out UMMATECH Store -

Welcome - Ummatech Online Store

If ash's around, I'd like him to tell us more about the store and what they're offering.

Myntra Makeover - New Myntra Is Cool

Posted: 04 Feb 2011 04:59 AM PST

Myntra.com - leading custom apparel design & ecommerce company based out of Bangalore (also responsible for most the CEoM T-Shirts) has just released a new version of their website. The new logo is more colorful.

Mukesh Bansal, the CEO of Myntra sent out a mail to all the subscribers (look below) -

Dear Customer,
I am very excited to share the new Myntra brand identity and User Interface. This is a major step forward in our continuous endevaour to have best products and experience for you. Your patronage and feedback over last 3 years has made Myntra #1 online player in India in personalization category. We have seen very high interest in personalized jerseys for Team India, IPL and Soccer teams and many of you have been asking us to expand our product portfolio by having a broader Sports collection.


Well, we have done exactly that by building India's largest Sports Lifestyle collection on Myntra.com. We now have an extensive catalog featuring Nike, Reebok, Puma, Adidas, Lotto, Fila etc. and many more brands in the pipeline. In order to make the entire shopping experience better we have also completely revamped the user interface incorporating a lot of feedback we have received from you.


We have also reworked our brand identity. The new identity is quite colourful and vibrant representing the variety in brands and product range that we have in the new Catalog. We will be adding many more categories in the months to come so that you always have a wide selection of products available with the same unwavering customer experience that has been the hallmark of Myntra brand till date.
We will look forward to continued support and feedback from you. Please feel free to share your feedback with me directly at ceo@myntra.com.


Check out Myntra's website and share your opinion about the new site.

Hello!!!

Posted: 04 Feb 2011 04:53 AM PST

Hello to all CEans out there , I'm HAROLD from AKLAN, Philippines. Studying BS Civil Engineering. I'm now on my 3rd year and I really love watching dvd's and I'm a music lover.

I joined CrazyEngineers because my other classmates joined too. I'm very jealous at them when they talked about this site crazyengineers. I'm very happy that I'm here now at last!!

Is Wikileaks Nomination For Nobel Peace Price?

Posted: 04 Feb 2011 04:49 AM PST

Wikileaks quickly became a household name by leaking out government documents and unearthing the videos of Iraq war.

WikiLeaks has been nominated for a Nobel Peace Prize by Snorre Valen, a Norwegian lawmaker. Typically, nominations stay secret for 50 years, but Valen announced his nomination through his online blog.


Valen, a member of Norway's Socialist Left Party turned in his nomination in person on Tuesday, the last day the committee accepted nominations. If WikiLeaks does receive the prize, the site will be entitled to an award of $1.6 million.


Is it justified? Your opinion, please.

pratishruti 11

Posted: 04 Feb 2011 04:20 AM PST

Experience the cultural extravaganza at SHRI RAMDEOBABA KAMLA NEHRU ENGINEERING COLLEGE kick starting from 3rd feb. Feel the symphony in the cultural atmosphere. New events like paintball, zorbing, boxcricket any many more surprises. rocking performance by UNDERGROUND AUTHORITY on 4th feb. A lot many competitions and a lot more prizes to be won. hurry up.!!!!!!!!

Paper cups machines

Posted: 04 Feb 2011 02:48 AM PST

Hi buddies,
Here i am giving some ideas about the usage of paper cups and how to develop the business by using Paper cup machines..

In food and beverage businesses, packaging is of prime importance as in shopping malls, theaters, multiplexes, offices, places of mass congregation and where people throng in large numbers, it would not be much easier to use recycled containers. Further, wastage of water and time consumption will hinder smooth functioning and performance of your business. The price of a Paper Cup Making Machine is not a business constraint since overhead costs will amount to huge proportions in a matter of time. This makes equipment cost negligible in businesses driven by mass production.

Crazy Idea: Let's Create an Engineers' Pledge/Oath

Posted: 04 Feb 2011 02:00 AM PST

Everyone is aware of the fact that Doctors take pledge/oath when they graduate.
But we as engineers don't take any such pledge or oath.

Let's create our own "Engineers' Pledge". :cean:

We will start by collecting points that we would like to include in it.
For e.g. What are the rules that you should abide to as an engineer? What will make you a good engineer?
We can include something like 'things to follow when you start calling yourself an engineer'.

What do you think about this idea? Please shoot your opinions and comments and interesting points to be added in the pledge.

We will compile them into one final engineers' pledge :D

7th Annual Global Marathan For Women in Engineering and Technology

Posted: 04 Feb 2011 01:50 AM PST

Innovations in engineering and technology address many of the world's most complex challenges—clean water, new medicines, and safe roads. Everything we know has been touched by engineering. Thought leaders agree that jobs in these fields are the jobs of the future. Yet, in almost every corner of the world, there is too little talent in [...]

More...

Myths About Engineering You Should Know: By Arun Karuppaswamy

Posted: 04 Feb 2011 01:13 AM PST

Found this article while surfing. I thought I should share it with you.

Two incidents drove me to write this article. In the first incident, a woman wished that her son became a “Mechatronics Engineer” (Mechatronics deals with the mechanical and electronics principles applied together). She explained that “Robotics” is the future of the world (guess Steven Spielberg has had some influence over her) and “Mechatronics Engineers” would be in great demand in future. She thought her son could build a robot on graduating.
In the second incident, a student from my school got into an IIT recently. One of my schoolteachers mentioned this and added: “He is a brilliant student who is well-planned. He has started preparations to sit for GMAT after his engineering.” GMAT is an examination to get into management schools (primarily in the U.S. and several other English-speaking nations). My teacher believes that engineering, followed by a management course, is a good option.
In this article, I try to make clear some facts about ‘engineering' — facts which will prove the above (and some other) expectations and beliefs to be far from reality.

Engineers are super-humans

People do not understand the reality of ‘engineering.' For them, engineers are “super-humans” who build rockets, robots, electric vehicles and the like. The reason is that when a person says he works on a satellite project, people jump to the conclusion that he knows every detail of building a satellite. In reality, no engineer can know the entire details of projects. For example, it requires people from various disciplines such as electrical, mechanical, chemical and materials engineering to design an electric car.
Since the common man has the “super-human” view in mind, he generally does not accept or appreciate many of the “real” engineering works. For example, a home inverter might not bring about any awe to the common man as does an electric vehicle (though both might be equally challenging to build), because he often finds a technician setting right the problems in a home inverter. The technician just knows by experience what to do, whereas an engineer knows why it has to be done.

Engineering is more valuable than science

First, I will clarify the difference between ‘science' and ‘engineering' through a simple example. The study of optics of materials will fall under science. Scientists (physicists, in this case) will try to explain the optical properties which different materials possess. If someone tries to use the optical properties to make a microscope or a camera, he will be an engineer. Scientists establish facts which engineers exploit to make things useful to society. History would tell you that scientists did a lot of engineering work in the earlier days (between 1700 and 1900 when a lot of development really happened in science and engineering).
Today, with the vastness of the different fields, science and engineering have separated . Now, scientists rarely take up engineering work. Nevertheless, I would say scientists play a greater role as they have to establish the basic facts for engineers to build upon.
Unfortunately, since the result of engineering is the one that fetches money, people have a craze for engineering. It is disheartening to see a Ph.D. student in science getting a lesser stipend than a Ph.D. student in engineering. It should have been the other way round. Any nation that ignores the role of science cannot survive in the long run.

Management studies goes with engineering

A degree in engineering followed by a degree in Management is the much sought-after combination. Again, a ‘myth' that engineering and management are related is at work. Engineering (with science as the basis) has nothing to do with management (which does not involve science). A lucrative salary is what attracts people to management studies.
Furthermore, most institutes do not introduce engineering in a proper way, leaving students without confidence to pursue higher education.

We need more IITs

There are many IITs coming up, ostensibly to help the nation meet the requirement of engineers. Truly speaking, we have enough of engineers. Design, the work of engineers, requires just a few people.
The dearth is not in the number but in the quality of engineers we produce. It is enough if we are able to improve and maintain the quality of our institutes and retain the people graduating from them by creating ample opportunities for them to work in India with a good salary. It is better to improve and maintain the standards of the NITs, the IITs and other government institutes than creating newer ones and diluting the existing standards.

Foreign MNCs do best R&D engineering

Foreign multinationals that claim to have research and development centres in India do not do real engineering work in the country, as it is natural for any company to have real product development on home soil.
Here again, the salary is what attracts people (thanks to the dollar-rupee conversion). This is a case of brain drain, in which the brains are hired not to work. Though many might not accept, the basic aim of the foreign MNCs is to utilise the cheap labour in the developing countries to run their manufacturing units; product development is not their primary goal.
People generally end up doing tasks that are not as challenging as is the work in smaller Indian industries trying to develop products of their own.

A B.E/B.Tech graduate is an “Engineer”

With the vastness of technology, in the present day one cannot call oneself an engineer just on graduating. A B.E./B.Tech. graduate knows just the basics. I would say that post-graduation is a must. Or at least, one needs to work for a few years to understand and build engineering products. A lot of people believe that a B.E. graduate in aerospace would be able to build rockets on graduating. If it were so, there would be rockets flying everywhere!
I would advise people without an engineering background to talk to people who do real engineering work to take decisions before choosing the field for their children. The aim of education is not merely to land a high-paying job. It should empower you to find a suitable work for yourself.

Third Year Project Idea: Bicycle Mobile Charger

Posted: 04 Feb 2011 12:53 AM PST

Today, I read a news about Nokia introducing a bicycle mobile charger in India in March this year.
If you are an Eco-friendly person and believe in energy saving concept, this is something to rejoice.

As per media reports, the charger would be priced at Rs. 1,499.
It would be great if you can develop this as your mini-project and price it lesser than this. ;)
The concept isn't new the charger's dynamo will be attached to front wheel and will be charged while it rotates.

The reports added that the charger will give 28 minutes of talk time for 10 minutes of cycling at speeds between 6 kmph and 50 kmph.

What do you think Crazy Engineers?
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