Questions tagged [cad]

Computer Aided Design

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232
votes
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 ...
30
votes
6answers
7k views

How were schematics drawn before CAD?

I was looking at the schematic of an old HP power supply I bought. It can be found here, around page 60-61. This schematic was drawn long before CAD was a tool used by engineers. Things were still ...
6
votes
1answer
15k views

Importing Drawings ( DXF ) in Altium

I'm having trouble importing DXF / DWG into Altium. I followed the procedure outlined in the Altium wiki File-->Import (selected my dxf) and nothing shows up on my mechanical layer. I've tried ...
29
votes
4answers
43k views

Eagle - How to attach a pin not shown on schematic symbol?

In Eagle, I would like to include SN74HC595 shift registers in my project. I found a library online a few months ago (can't find source anymore) that has this part. The symbol looks like this: ...
16
votes
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 ...
8
votes
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 ...
15
votes
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 ...
11
votes
3answers
37k views

Editing title block/frame in Eagle

As you may know, along with my previous posts in SE I've shown myself as getting familiar with Eagle. And hence, new things to learn are coming and some are not always transparent. A simple thing ...
4
votes
2answers
5k views

Designing castellations/half holes using EAGLE

I wish to use some castellated pads or 'half holes' for board to board connections but I'm having a hard time finding a reference detailing how to specify these in my CAD package of choice (EAGLE). My ...
3
votes
1answer
1k views

Eagle CAD pins with same function

I would like to design a tactile switch footprint, where there are clearly two pads and two pins on each side of the switch, but let eagle cad's router know that it can route to either pair of pins. I ...
7
votes
3answers
1k views

Angles and measurement - PCB design help

I have started doing PCB design from last month and very new to this. I have done tiny bits on eagle cad and Altium cad but still learning things everyday. Now I got a challenging board to do. Though ...
2
votes
1answer
2k views

How do I add the board of a pre-existing controller to my project?

I have a DigiSpark board that has the schematics and board files released in their website. I am making a PCB where I need to have that part in my circuit. Right now I have tried editing the ...
0
votes
3answers
716 views

KiCAD parametric component placement

I need to place components in a circle of a certain diameter, with a certain pitch, and angled evenly. Is possible to do it in KiCAD automatically?