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Computer Aided Design
Computer Aided Design (CAD) is the act of using computers to design an object. CAD techniques follow standard engineering design and drafting procedures, but use a computer to help speed up the process.
1,069 Questions
How many commands are there in AutoCad?
Billions and billions :)
are you asking for the commands list or commands which are important and basic one......around 259= basic commands are their for autocad.
and for the list please go with this link: http://academics.triton.edu/faculty/fheitzman/commands.html
List and describe the different coordinate entry methods available in AutoCAD?
AutoCAD Coordinate Entry Methods
Absolute Method: (X,Y)
Absolute Cartesian coordinates specify a point's exact distance from the origin point of
the coordinate system, which is represented as (0,0). The absolute X and Y coordinates
are signed numbers.
Relative Method: (@X,Y)
Relative Cartesian coordinates specify a point's exact distance from the last point that
was entered.
For example, typing @4,2 tells AutoCAD to locate a point that is four X units and two Y
units away from the last point entered. The X and Y relative coordinates are signed
numbers.
Direct distance entry is a shorthand relative coordinate entry method.
Polar Method: (@Distance
Polar coordinates specify a point's exact location by a distance and angle from the last
point that was entered. The distance is always positive and the angle is measured from the
positive X axis.
For example, typing @4<45 tells AutoCAD to locate a point that is four units away from
the current location and at an angle of 45 degrees from the horizontal.
ABSOLUTE COORDINATE
The trimmer resistor is a calibration device used to correct (trim) the resistance of some other resistor. An example might be the feedback loop of an op-amp in common mode. If you wanted a gain of two, you might use a resistor divider with a two to one ratio. Resistors have tolerance, however, so the stated value will not be exact. You place a trimmer resistor in series with one of the other resistors, picking the value so that, if the two other resitors were exact, the trimmer is set to midpoint, and that the trimmer's range covers the expected tolerance of the other resistors. Then you calibrate the circuit to the expected gain using the trimmer.
If you are talking combinations, without binary number representations, then you are talking about a circuit that has a 1 output when any input is a 0. That is a 3 input NAND gate. If you are talking binary number representation, then you are talking about a circuit that has a 1 output when the inputs are 010, 001, or 000. Use a 3 to 8 decoder, with an OR gate on the low three outputs.
How can your outline help you if you get stuck while drafting?
Your outline helps you see the organizational path that you have already set.
Your outline lets you review your original ideas.
Why is input waveform from a transformer altered from a pure sine wave?
The input waveform from a transformer is altered from a pure sine wave because the load is not purely resistive, meaning in this case that it is not "continuous". Many loads do not pull current "all the time" during each line cycle. A power supply, for instance, only pulls current when the filter capacitor is being charged by the rectifier. This is because the rectifier biases on to charge the capacitor to the peak value of the input waveform, then the capacitor discharges at a rate dependent on load while the rectifier is biased off, until the voltage intersects the next rising input wave. This means the current load on the transformer is actually pulsing on and off. (This is true for both linear and switching power supplies, although you can reduce the pulsing with appropriate inductance in the filter circuit and a more complex design.) Since the AC supply is not "perfect", i.e. having a Thevanin equivalent series resistance of more than zero ohms, along with cables that do not have zero ohms, along with transformers that are not "perfect", this pulsing current induces a pulsing deviation in the input AC waveform. This effect can be observed even without a transformer in the circuit, but transformers make it more measureable, because the transformers introduce additional "inperfection".
it provides a way to calculate the time profile of charge collected on a electrode based on the geometry of the electrode and the motion of a charge distribution near the electrode. It basically determines the waveform (pulse shape) collected by an electrode due to the presence of a drifing charge, as would happen in, say, a solid state particle physics detector.
Does 10BaseT cable need terminators?
Every transmission line requires termination, either in the form of the ultimate load, such as an antenna, or in the form of some kind of resistor. 10BaseT is no different.
However, that termination is usually built in to the device in which the cable is plugged. This is different from older systems, such as ArcNet, where the coax cable requires termination on each of the far ends. This is because the 10BaseT system is a star system rather than a partial ring system, so the termination is not a function of the chosen topology.
The reason termination is required in a transmission line is that every step change in characteristic impedance encountered by the wave front as it propagates through the line results in some kind of reflection back towards the source. These reflections result in distortion, loss of power, even damage to the transmitter or circuit.
To reinforce this understanding, consider the 75 Ohm coax cable typically used in a television distribution system. In the simplest case, you connect a cable from the service entrance to the TV set, and you are properly terminated. If, however, you use a splitter, such as for a TV set and a VCR, you now have three transmission lines, one to the splitter and two from the splitter. Is the RF output of the VCR connected to something? It should be, either to a TV set or to a terminator, otherwise there will be problems due to ringing, interference, ghosting, etc.
Upstream data is data from process units upstream of whatever unit you are concerned with. Usually this includes such properties as temperature, pressure, density, composition, enthalpy, heat capacity, etc.
State the imitation of ohm's law?
imitation of ohms law is that it can be applied only to linear devices it cannot be allowed to non linear devices...
What is the Difference between conceptual and technical design?
Conceptual Design
• written in customer's language
• explaining the observable external characteristics of
the system
• contains no technical jargon (If it does, define it.)
• describes the functions of the system
• is independent of implementation
• is linked to the requirements documents
Technical design
• describes of major hardware components and their
functions
• shows hierarchy (organization) and functions of the
software components
• shows data structures and data flow
• shows interfaces
What is a plane in auto cad terms?
Plane is the area provided to us for drawing in autoCAD. It may be of 2 types 2D plane or 3D plane, while viewing a 2D plane we can only see a 2D view of our drawing and on a 3D plane a 3D model created in autoCAD can be viewed.
What is CAD and CAM and where would you use it?
Using Wiki answers or wikipedia just makes more work for you. You have to check other sources just to make sure your information is accurate. Do the easy, smart, and risk free way to get info-check a website that not just anyone can edit.
What is a CAD platform and how is it different than a CAD system?
A CAD platform is a program such as AutoCAD and a CAD sytem is a connection between CAD and CAM Products.
How do you set up the drawing template parameters in cad?
Do all the changes that you want in a normal new document, like adjusting dimensions and viewports ect, but then save it as an AutoCAD Drawing Template .DWT file, then you can go into the options and change it so that your template is the one that opens up every time you open a new drawing.
Which of the following power-related problems is associated with a short term voltage drop?
A brown out.
How do you bring a woofer effect in 2.0 speaker?
A: 2" speaker I imagine. there is no way. to move air at low frequency requires air volume. However if 20 2" speakers are attached to the same membrane it will work,
Where do you find your request code for AutoCAD 2010?
From Autodesk or on the product if you bought it. If you have an illegal copy, well your life of crime will only continue if you can figure that out for yourself, but I'll give you a clue to set you on way down the path of civil misbehaviour you may have embarked on, you need a keygen (key generator).
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What is the best jewelry design software?
Hello Everyone,
The best 2D software to design jewelry or Trace the jewelry for technical drawing would be CorelDraw.
I am a Jewelry Designer for 5 years now and have been using CorelDraw and Illustrator to make the tech specs. But the flow and accuracy that I can achieve with CorelDraw is not even remotely achieved by Illustrator. Illustrator is wonderful software for Graphic Designer and evrything, but when it comes to Hard Core Jewelry technical drawing, its CorelDraw, in my opinion.
Manual drawings are usually hand drawn on mylar sheets using a drafting table. Computer aided can mean several things. Using the computer to simulate a drafting table, or solid modeling that can be copied to the machines of many. This would include CAD for design engineers, CAM for manufacturing people, CAQ for quality control, etc.
Define the efficiency of a rectifier?
The conversion efficiency n of a rectifier ckt is generally defined as
Na= dc power delivered to the load/ ac power input to the rectifier ckt. Or n = Pdc/Pac
