Engineering - June 2007

2007-06-04 03:52:12 · 2 answers · asked by mr_engineer 1

I need to get a simple 6V circuit working with a 12V powersupply, what resistor do i need to get it working?

Do i:

A/ Double the size of existing resistors in the circuit(although im guessing not)

B/ Put a resistor on the plus side, between the circuit and the psu, and what resistance should it have?

2007-06-04 02:33:59 · 11 answers · asked by Anonymous

I am studying for b.tech and want to do a project combining electrical or electronics and computer science... can any one please suggest me a topic??

2007-06-04 02:29:02 · 5 answers · asked by karthu s 1

Suggest any good book on RF or any internet, online material, pdf, interview Q and answers.

2007-06-04 01:34:27 · 3 answers · asked by iluindia11 1

how agenerator generates electricty ?

2007-06-04 01:28:37 · 3 answers · asked by Anonymous

2007-06-03 23:55:46 · 7 answers · asked by Anonymous

http://www.youtube.com/watch?v=MgROBScFUfc

2007-06-03 23:48:56 · 2 answers · asked by Anonymous

2007-06-03 20:50:16 · 10 answers · asked by Anonymous

Need a detail tutorial on designing SMD component with Eagle. I always got an error, don't know what I did wrong.

2007-06-03 19:16:15 · 3 answers · asked by BWK 1

this moment of inertia is not related to the mass.
it is the second moment of area i'm talking about......

for example take the semicircle the moment of inertia about the centroid parallel to its base(diameter) is= 0.11*r^4

but the moment of inertia about the centroid perpendicular to its base is =(pi*r^4)/8
why is it so?

2007-06-03 18:50:19 · 3 answers · asked by Anonymous

Solenoid coil was used in a refrigeration circuit and is exposed to marine environment. Current fuse eventually burnt, causing circuit to shut down. I have the solenoid coils in my possession to do a teardown analysis. Need advice on how to determine the root cause of failure and concrete evidence.

2007-06-03 18:10:56 · 5 answers · asked by dingdang8 1

If so where can I find the technical specs on ones that are a commercial success and the functions that they are capable of?

2007-06-03 17:25:20 · 5 answers · asked by Anonymous

Or a free energy generator?

2007-06-03 15:47:01 · 5 answers · asked by Anonymous

how come when birds land on electrical lines...nothing happeneds...but when we touch them we get fried??

2007-06-03 15:46:49 · 11 answers · asked by Sugar_Plumzz 3

So often, bridges spanning a divided highway (say, 4 lanes total with a grass strip in the middle) span the whole thing. There are no columns in the middle, which would make the I beams much lighter. From what I recall in mechanical engineering, the stress on the I beams goes up dramatically (more than linearly) with the span. And deflection goes up as a fairly high power (3rd, 4th, 5th, more?) of the span. Also, the supports typically are slanted away from the shoulders, requiring even more span. It looks like these bridges are crying out for a set of poles in the middle.

2007-06-03 14:45:10 · 5 answers · asked by Anonymous

2007-06-03 13:13:11 · 11 answers · asked by Green 3

On a detachable link for anchor chain, I believe that I have heard that the extreme pressure developed when driving the slightly tapered locking pin can cause a recrystallization of the steel parts into silicon steel when silicone spray is used. White grease is recommended, plus an annual disassembly and regrease. Materials engineers to the rescue?

2007-06-03 12:24:20 · 2 answers · asked by geojr1955 2

The resistance of a certain wire is 13 ohms. What would the resistance of the same wire be if it were five times as long?

Answer: 65 Ω

What would it be if the wire were five times as thick?
Answer: ___ Ω

Note: Please also explain how you solved it.

2007-06-03 11:47:20 · 5 answers · asked by James W 2

All are in good clean condition that need mechanical repair and it wouldn't be cost effective if repaird and resold. So what else can I do with them instead of useing them for scrap metal.

Any Artistic, Rural, & ECO suggestion's would be of great help !

2007-06-03 11:45:46 · 3 answers · asked by scratch_n_sniff 3

2007-06-03 10:53:26 · 2 answers · asked by Anonymous

2007-06-03 08:59:06 · 6 answers · asked by sdbens2 1

2007-06-03 08:53:20 · 5 answers · asked by Brian W 1

and the relation bitween nanotechnology and biomedical enginiering.

2007-06-03 08:29:16 · 4 answers · asked by mohammad s 1

Also is there a way i can make my antenna more...portable?If i wrap it around a circuler object will it make it better?If I hang an antenna indoors will it still pick up broadcast?If i don't ground the ground wire will it work?

2007-06-03 08:26:01 · 3 answers · asked by Anonymous

2007-06-03 08:24:15 · 2 answers · asked by Anonymous

Please tell me how I can make a divide-by-3 counter using 74LS90 IC's?

2007-06-03 08:12:09 · 4 answers · asked by rrbowker2002 3

I have a 17,000 gallon pool that stays around 76 degrees during the summer. I want to be able to circulate enough heated water (BTU's) to maintain an 86 degree temp. thru the summer months. This question has nothing to do with how I plan on heating the pool (black plastic solar panels btw) but how may BTU's I will need to raise 17,000 gallons from 76 to 86 degrees and maintain that 86 degree water temp 24 hours a day. The solar panels that I'm looking at produce 80,000 BTU's in a 24 hour period. I don't know how difficult this problem will be to solve but I'm sure some engineer is out there that can. Thanks.

2007-06-03 08:02:46 · 2 answers · asked by classic_stump 1

electric meters register killowatt hours, what I want to know is what is the difference between killowatt hours and the hours that are found on any clock?

2007-06-03 07:00:43 · 6 answers · asked by Wayne B 2

How does one become an HVAC designer

2007-06-03 06:25:13 · 2 answers · asked by Anonymous

If you collect a large amount of heat at low temperature, say from underground piping, how do you convert it to useable heat for domestic purposes like cooking and central heating?

I'm thinking of a domestic scale operaton with reasonable capital cost and DIY maintenance.

2007-06-03 04:46:50 · 7 answers · asked by Paul R 1