Questions tagged [cad]

Computer Aided Design

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1answer
808 views

DipTrace bottom layer pad shape

I'm having a problem in DipTrace. I'm trying to change the shape of the pads on the bottom layer. I have successfully created and had etched a similar PCB in DipTrace yesterday, and have followed the ...
2
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1answer
299 views

Simulation of a circuit

I am trying to simulate this circuit i want to know if the circuit i assembled is correct? i want the current of VCCS element 1 and 2 plotted on a graph as i vary Vtun, Vsprog and Vdprog. I am using ...
6
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2answers
25k views

Where to find buttons eagle cad

Does any one know where to find buttons in EAGLE that look something like the one in this schematic? I'm making a schematic and all I can find are complex looking buttons. If those are not available, ...
2
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3answers
258 views

Routing of an ASIC chip - time taken?

In a typical ASIC design cycle, how much time is taken by an EDA tool to complete the routing? Assume a fairly complex chip (like the Ivy Bridge). I've heard the entire chip design cycle is typically ...
16
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1answer
6k views

Why do I get warnings for all my voltage supply connections in Eagle CAD?

Take a look at the following list of ERC errors: Why is Eagle CAD showing Warnings for the voltage supply connections? For example: POWER pin U1 VIN connected to VBUS I know these pins are ...
15
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1answer
4k views

Designing Pick-and-Place-friendly CAD library parts

I'm working on a PCB design with surface mount components to be manufactured by a PCB assembly shop. I'm using CADSTAR, and I had to populate the library with some components, from scratch. I'm new to ...
1
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3answers
266 views

Feasibility Question and Advice on CAD software

For a hobby project I have bread boarded, I am considering using a pair detectors that operate as a single use physical barrier. When hit by a projectile, a trace is broken allowing +5VDC to to ...
1
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2answers
197 views

How do I select pins in Quartus 2?

I'm trying to complete homework with what appears to be a newer version of the software than what the instructions are for. It says in the instructions that I should select "pin" from the category ...
4
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4answers
72k views

How to open .sch files? [closed]

I have what should be a schematic file from a vendor, its suffix is .sch. I tried opening it with Eagle CAD but it wouldn't open. I then looked at the file with a text editor and there seem to be ...
2
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3answers
545 views

Electrical Circuitry Programs aimed at Children / Beginners

I'm sorry of this is off topic, but I figured I have a better shot asking the question here then anywhere else. What I'm looking for is an Electrical Circuity program that was released around 2000 ...
2
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5answers
4k views

PCB (Auto-)Routability

Background I'm working on a fairly dense mixed PTH/SMD (plated through hole / surface mount) component PCB design. I'm using Eagle CAD for it for the schematic capture / layout and I'm using the auto-...
39
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1answer
48k views

Where is the Eagle component library for 0.1" breakaway headers?

I want to put some breakaway headers into my Eagle CAD file. By that, I mean these: Does Eagle come packaged with a library for these? If so, what is the part called, and which library is it in?
2
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1answer
2k views

I need help with Eagle CAD how do you edit silk screen how to add copper to the empty spaces

Like the title describes, these are two things I need to know how to do in eagle. Any pointers? Thank you. P.S. if anyone knows a tricky way to get an image into the silk screen it would be ...
8
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1answer
27k views

How do I install a KiCad schematic or footprint library?

After I download a KiCad schematic library or footprint library -- such as the ones from http://kicadlib.org/ -- how do I use it in my schematic and layout? Should I install that KiCad library file ...
8
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2answers
5k views

Why ratsnest is called so?

In my favorite CAD, Eagle, there is a function called "ratsnest", which removes all multisegment airwires and replaces them with one straight airwire. According to wiki of some other CAD, A ...
9
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2answers
11k views

Rounded corners in Cadsoft Eagle

I am sending off a pcb for manufactering, but it would be nice to round off the corners for them to mill off. How can I make nice rounded corners? I have used the three point arc thing before but I ...
-1
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1answer
599 views

Recad laptop motherboard PCB?

I have taken an interest in a current effort to create a (mini- or micro-) ATX motherboard with a custom CPU. But ideally, I would want this system in a laptop instead. I got this idea, how hard ...
1
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1answer
194 views

Change group pin width with eaglecad?

I am designing a package in eaglecad and I got the pin width incorrect. I don't want to change all 100 pads manually. Is there a way to select a group and change the dimensions on all the pads? ...
7
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9answers
2k views

3d modelling software for case design

What software is generally used in industry to design cases for pcb boards?
22
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5answers
15k views

Is there a common netlist format?

Is there a common netlist format that is portable between different schematic/pcb/EDA/CAD tools, and if so where is the format or reference so I can implement it? If not, does each package implement ...
4
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2answers
1k views

Tango to Eagle Schematic import

Does anyone know a way to get Tango schematics into Eagle? Even if it is a hard way (other than entering from scratch)... Of course, an easy way would be nice. Cheers, Marcus
232
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37answers
98k views

Good tools for drawing schematics

I was going to add a bit of information to my post on a previous day using schematics and some instructions. What programs are being employed for this purpose? I mostly want to see what others are ...

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