Thursday, January 27, 2011

CrazyEngineers Forum

CrazyEngineers Forum

what about embedded systems designing as a carrier???

Posted: 27 Jan 2011 12:13 PM PST

what about embedded systems designing as a carrier?is there a bright scope of this field in india ?what are job apportunities?and finally the major question can an electrical and electronic engineer also go to this field and if yes then what are skills required and what steps should be taken to develop those skills?:)

Do You Really Know Binary?

Posted: 27 Jan 2011 10:10 AM PST

"There are 10 types of people in this world, those who understand binary and others who don’t.". You must have heard this phrase, isn’t it? This is one of the most used phrase by computer geeks, the phrase signifies importance of binary language in computing. Sometimes when I ask people about what binary is, they [...]

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Labview software

Posted: 27 Jan 2011 09:30 AM PST

Can anyone post details about labview projects.Just turn your look on labview...Its an one emerged software supplied by National Instruements.I guess most engineers will have scope on this labview...
Your opportunities on automated side....
Just take a look on this...i hope you do...
All the best

DC generator equations

Posted: 27 Jan 2011 09:12 AM PST

Hello,
I am using DC permanent magnet motor as a DC generator. I would like to calculate the estimated output voltage and current from the generator at known speeds. I already know the armature resistance and inductance for the motor. Do you know where can I find the equation?
Many thanks

saturated operational amplifier

Posted: 27 Jan 2011 08:20 AM PST

Hi all!
This is my first post so, sorry if I would not be proficient in discussing electronics or if maybe this is to demanding for the forum :rolleyes:

I am stuck in a practical experiment, I studied how amplifier for obtaining gain work. And I created a small circuit with an astable multivibrator, and operational, 2 resistors, two batteries of 9v:
Something like this:


Where the settings are :
non inverting input.
Rf = 300 K, Rg=150K
And the expected gain should be : Av= 1 + Rf/Rg = 3.
Doing a simulation I obtain reasonable results.
Where the output in volts of the operational is effectively augmented.
But when I build the real circuit it doesn't happen:
The oscillator generates a square wave that I can detect with
oscilloscope and even with a tester (between -4.80v +4.80v ), the output of the amplifier is instead stuck to 7.8v.
I have done this with a LM741, and also using a LM386 (one with
single supply) and nothing.
The crazy thing is that I obtain constant 7.8 v independently from the value of the feedback resistors (like they don't matter) and even if I completely disconnect the input.
So, it is like if whatever I do with this configuration

the amplifier saturates to 7.8v and end of the story.
I also tried the inverting input configuration and nothing.

Someone told me I need to insert a capacitor between the two part of the system and one in the output., but what is the logic in this ?
1- Why do I need a cap between the 555 and the op? and what should be its capacity ?

2- Putting a cap am I not interfiring in some kind of way into the frequency (it is a relative of an high pass in that way) ?

3- Why and what should be the capacity in the one in the output ?

4- Assuming i connect a photodiode with a transinpedence amplifier instead of the
square wave generator should I also put a cap before the amplifier ?

5- Since the LM386 is single supply if I use it instead of the LM741, should I add some kind of virtual ground in addition to the cap ?
Thank you for the patient :lol:

XXIV All India Builder’s Convention 2011 Covered

Posted: 27 Jan 2011 07:30 AM PST

The XXIV All India Builder's Convention is taking place this year in Chennai at the Chennai Trade Centre from January 23rd-25th. This year the convention aims at discussing the "Endearing construction with enhanced technology". DAY 1 (23.1.2011) With this theme the convention kicked off with a inauguration by Union Finance Minister of India Pranab Mukherjee. [...]

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US Dollar : A stable currency?

Posted: 27 Jan 2011 07:21 AM PST

guys i dont know..but i want to know if US dollar is no longer a stable currency

College Techfest / Event Names Collection

Posted: 27 Jan 2011 06:15 AM PST

With the number of engineering colleges mushrooming in every part of India...and each one of them trying to host their own tech-fest, it's become more harder than ever to come up with a good name for the tech fest. To make it worse, all the good event names are already taken :mad:.

Why not come up with suggestions for event names (New & Original) which colleges can pick up for their events?

Here's my suggestion: Technothon

:happy:

'Suggest to Friends' Link on Facebook for CrazyEngineers Fan Page

Posted: 27 Jan 2011 05:48 AM PST

I am sure, all of us, the regular members at CrazyEngineers want others to know about CE and share our engineering spirit.

Now, you CAN do this by clicking a few buttons from your keyboard.

Login to Facebook and Go to the CE Fan Page here: CrazyEngineers Fans | Facebook

Click on the 'Suggest to Friends' Link that you can find just below the Proud to be a CEan Logo/Profile Image on that page.

Select all your friends from the pop-up box that appears. :cean: And its done!

If you have done it or are doing it after reading this, post it in the comments below.

ACM Bangalore IT Quiz on 29th Jan 2011

Posted: 27 Jan 2011 05:34 AM PST

Annual Quiz is one of the annual events from the diverse array of activities of ACM Bangalore.The ACM Bangalore Quiz is an attempt to bring together IT professionals and some bright students across universities together in a fun-filled and yet competitive forum.This is a first quiz of its kind with questions ranging from basic computer science to software and related domains and some to see how aware are you in the Bangalore IT domain. The participants will be representatives of various companies and also enthusiasts who want to prove that they are 'IT maestros'.

Timings: 8:30a.m.-6p.m.
Venue: Honeywell Technology Solutions Lab(HTSL) 151/1, Doraisanipalya, Bannerghatta Road Bangalore- 560 076, India(Opposite to IIM, Bangalore)

For Registration Details visit: ACM Bangalore - 3rd Annual Quiz

Boiler Tube Leakages: The Poor Power Problem

Posted: 27 Jan 2011 05:30 AM PST

In many power stations which are using coal as fuel, boiler tube leakages are common factor for forced outage of the Unit. In states already reeling under power shortages/load shedding such outages add to further load reduction. Common man is sufferer in spite of paying the huge electric bill. Major reasons contributing for boiler tube [...]

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Local Engineering College steals BITS Goa Event Name: QUARK 2011

Posted: 27 Jan 2011 05:28 AM PST

We all know that QUARK 2011 is a popular event by BITS Goa Campus held every year by them.

I just figured out on CE-Events Section that a Private Engineering College:
Tulsiramji Gaikwad Patil College of Engineering stole their name 'QUARK 2011'

Are the engineers so short of good event names?
At least they could have chosen some not-very-famous event name. :o

GstarCAD Successfully Applied in Open University, Vietnam

Posted: 27 Jan 2011 04:40 AM PST

Beijing, China, January 25, 2011, GstarCAD, one of the world leading providers of 2D/3D CAD software, today announced that GstarCAD software successfully applied by Saigon Water, Environment And Infrastructure*Joint Stock Company*(SAIGON WEICO) in technical design and construction design of technical infrastructure, water supply, drainage and wastewater treatment system in Open University HCMCity, Vitenam. SAIGON WEICO [...]

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Sony NGP is PSP2

Posted: 27 Jan 2011 03:50 AM PST

Sony calls the next generation Play Station Portable the ‘NGP’ aka the Next Generation Portable.* The next generation handheld gaming console revolves around the following 5 aspects – A great new interface, location based gaming & entertainment, social networking services connections, augmented reality. The NGP will be compatible with Sony Playstation Suite – a cross-platform [...]

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Robotic Waiter Yumbo At Your Service

Posted: 27 Jan 2011 03:20 AM PST

The Bangkok University is now developing robotic waiters that can take your order and deliver it to your table as part of the "MK Robot Project". MK Restaurants are about to shift hospitality services to a new level by “hiring” robotic waiters. In addition to this, the restaurant also looks forward to using*radio frequency identification*(RFID) [...]

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