Questions tagged [cad]
Computer Aided Design
155 questions
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Are there locking headers in Autodesk Fusion 360? (Electronics design)
I'm making a PCB for a project of mine using Autodesk's Fusion 360, and I'm looking for some connectors to plug other PCBs into. I've had my eye on some Imperial Locking Headers but I can't find any ...
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7
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3
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366
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Software to get transfer function from a schematic
Is there a software (preferably open source) where one draws a schematic, one defines input and output and the software automatically gives the transfer function (to be more specific: a symbolic ...
- 1,616
0
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2
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103
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In Altium, how do I create mounting holes for a through hole transistor? [closed]
I am starting to learn Altium and I don't know how to create a through hole footprint. How do I get started on this?
https://www.mouser.com/ProductDetail/Diotec-Semiconductor/BC337-40?qs=...
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-2
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1
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62
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TinkerCAD Digital Logic LED [duplicate]
I finished building this circuit in TinkerCAD, but for some reason the AND gate won't behave like it's supposed to. Shouldn't the LED turn ON when both 1 and 2 are ON? Instead, it turns ON when both 1 ...
-1
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1
answer
75
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TinkerCAD Digital Logic
Everything here seems to be right, like the gates and resistors, but the gate seems to be the issue; the LED is off when the switch is on. What is the issue? I have also included the schematic.
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223
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How do I change minimum anular ring in vias for different layers in Altium?
I want to send my gerbers to a PCB manufacturer but its manufacturing capabilities force diferrent minimum anular ring for vias in different layers. For outer layers, its 0.13 mm and for internal ...
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0
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58
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Issue in understanding routing in VLSI CAD
I have chosen to undertake VLSI CAD as a part of my electronics degree and I came across this statement (Source : Naveed Sherwani, Algorithms for VLSI Physical Design Automation, 3rd edition , Chapter ...
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64
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Altium Efficient Usage of Signal Harness
I have a 16-channel differential analog input which I would like to represent through a signal harness (see below). I am new to Altium, and I am curious if there is a trick to define my harness more ...
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68
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PCB components/ creation
I am tasked with the creation of a PCB that is quite simple. It is only a simple route from a 26 pin MDR to a 2 pin terminal block. I am stuck though.
I am using Fusion 360 and I have a few questions.
...
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2
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4
answers
176
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Is there a Design Rules change to fill in this gap between an IC and polygon in Eagle?
I adjusted the clearance values, and that did not fill in the gap.
- 687
3
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1
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321
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What are some best practices for library management for schematic and PCB design?
Most CAD packages use a "symbol" and "footprint" library approach when it comes to designing schematics and PCBs. Some (like recent versions of Altium) have "component" ...
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ECAD Program that knows about breakout boards?
Are there any ECAD/layout programs that know about popular breakout boards in their component libraries? For example, pieces like an ESP32 Dev Board or TB6612FNG breakout board.
(note) I am not ...
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How do I get a bigger sheet size in Altium, updating current one?
I have a schematic sheet and I need more free space on it. The actual size is A4. I have right-clicked in the sheet, went to Preferences and changed the Sheet Size from A4 to A3 but that does not make ...
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106
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How to update HFSS component/block elements throughout design?
I'm trying to create a model in HFSS that has a particular block (in this case an SMP connector footprint) that is repeated a number of times throughout the design. It involves geometry I've drawn for ...
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142
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Net GND's unconnected alert remains off in Altium
I have my Altium Designer project where I have a net called GND. That's the ground. While routing, I can see these little white lines that alert me about which pad I need to connect to each other, and ...
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767
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Cadence genus synthesis script issue
I have written a genus synthesis script for synthesizing my design of Direct Digital Synthesis for a University project. The DDS design is working properly in simulation and is fully synthesizable. I ...
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Does anyone know how to delete a 3D Model of a part in AUTOTRAX DEX?
Trying to delete a 3d part but not sure how to.
Using AutoTrax Design Express Version: 2023.3.1
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2
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DC motor datasheet: dimensions
I have a PC280LG-302 DC motor, and I need to know the shaft length for this. In the documentation they just wrote it as DIM."A" and total length as DIM."B". Can anybody understand ...
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2
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1
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1k
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Relative path for KiCad custom symbols
I'm trying to make my KiCad projects portable & that requires my custom symbols & footprint I used for these different projects be portable as well. So I'm putting my "my_symbols" &...
- 409
2
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1
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137
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Stripping down this SVG diagram to be a footprint in KiCad
This is a continuation of this question:
Trouble finding/creating footprint for a specific switch (SP10T) in KiCAD
I have an SVG diagram of a SP10T switch, from which I would like to create a ...
- 409
1
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1
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325
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Trouble finding/creating footprint for a specific switch (SP10T) in KiCAD
Well, I feel that time has passed me by (guess I'm old), as the local makerspace I've been visiting don't even do chemical etching anymore & the process of manufacturing a PCB from schematic to ...
- 409
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3
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43
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Extra pads on CAD footprint
A Phoenix 2 pin connector I am using, shown here:
https://app.ultralibrarian.com/details/eb577c4a-1e49-11e9-ab3a-0a3560a4cccc/Phoenix-Contact/1725656
has 2 pins and 2 mounting legs. The std view ...
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1
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Definition of small-signal capacitances calculated by Sentaurus TCAD Mixed-Mode/AC Analysis
I'm currently working on a capacitance model which will be part of a greater compact model for a planar RFET.
I use Sentaurus TCAD to generate capacitance data, which I use to understand the ...
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151
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Multisim schematic to other CAD
Does anyone knows a way to convert my schematic file in MS14 to any other CAD system? I want to open it with Altium.
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1
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2k
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Creating a new schematic for an existing PCB in Altium
I'm pretty new to Altium (I'm used to Eagle) but I've been given the task of cleaning up an existing project. The project was originally one schematic and one PCB that would serve as two parts of an ...
1
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0
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What CAD software is used to design and manufacture projected capacitive touchscreens?
I am looking to learn more about how projected capacitive (PCAP) touchscreens are designed and made, specifically with laser ablation. What kind of CAD software is used to create layered drawings for ...
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1
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How to import wiring csv into cad?
I have a .csv file which contains the (complicated) points of the paths that I need my wires to trace. I would normally use EasyEda for making grbl files, but I don't think it is capable. Is there a ...
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505
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Is there a way in Mentor Graphics (Siemens) Pads Designer VX2.2 / Pads PCB to route through unused pads without generating a DRC error?
I am using an eMMC memory in one of my designs. It is in a 153 ball package (which appears to be one of two industry standard packages for this type of memory). The pads for the BGA balls have 0....
- 12.5k
4
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What does INH as an IC pin label mean?
While using a CAD model for a 74HC4051D multiplexer which I downloaded from SnapEDA I noticed that pin 6 is labelled INH rather than E bar (or Enable) as I anticipated from the datasheet.
What does ...
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962
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An alternative to CADe SIMU
CADe SIMU is a industrial circuit drawning and simulation software.
I have troubles with the icons size and some bugs, so I am looking for an alternative to CADe SIMU.
I found good softwares to draw ...
2
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58
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Hirose connector footprint comprehension
I am trying to understand how the datasheet of the DF40 series of connector from Hirose describe the footprint.
There is a part of the footprint receptacle that is hatched and I don't understand ...
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214
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Old EDA software for Mac called "EDS"
So we have some old schematics at work that were ostensibly made by an EDA software called "RUN" "EDS" probably sometime in the early 90s. Supposedly this software ran under the ...
- 535
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Is it possible to import CAD model files into LTspice?
There are very beneficial and comprehensive collections of CAD models provided by Mouser or other websites. Is it possible to use them in LTspice?
- 755
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How to export EAGLE 9.6.2 design to CADSTAR 2019.0
Does anyone know how to export board from EAGLE 9.6.2 to CADSTAR 2019.0, so that
CADSTAR can be used for making a layout and further netlist?
Any readily available ULP script might help.
The schematic ...
- 362
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132
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Altium - imperfect polygon-via connection
Altium tries to approximate circles where it doesn't need to.
I have a polygon pour with some vias inside, associated to the same net. The connection style is "direct connection" so the ...
- 391
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1
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2k
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How to switch SMD part for through-hole part in EasyEDA?
I'm using EasyEDA for the first time. I have about zero experience with CAD. I drew this schematic
And generated this PCB layout
But I really wanted to use a through-hole DIP package for the ...
- 14.8k
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1
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148
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Adding Holes to a custom EAGLE library
Currently, I am creating a custom EAGLE library for a relay that I couldn't find the CAD for.
In the packag stage:
I added the pads as seen in the picture and I'm having second thoughts about adding ...
- 123
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0
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339
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I have created a sub-circuit in Proteus but I can reuse it? How do I reuse it?
Basically I want to pack a large number of components to form a small device. I will use this device many times. So I created a subcircuit and designed my circuit in it. But whenever I make a copy of ...
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54
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How to define new component origin in EagleCad board view
I have been trying to rotate a component in my eagle pcb board mode but the centre of rotation has been defined upon one of the pins of said part. (potentiometer)
This is what I have done so far: I ...
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1
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348
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Eagle Cad Resize PCB
I am having trouble resizing the PCB after components have been placed. I know this is not the usual method, but I have been given a .brd file and .sch and the board dimensions were decided already. ...
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2
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250
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Where can I get a 3D CAD model of the lead frame of TO220-2L?
I am new to electronics packaging and searching for a 3D CAD model of TO220 with 2 leads. I have tried at numerous websites without any luck. If anyone has a 3D CAD model of this lead frame or can ...
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265
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Altium Polygon Pour gap - minimum feature clearance rule?
Didn't find anyone covering this.
On this image I'm showing a GND Polygon pour artifact that I cannot seem Altium to detect that gap is too narrow.
Polygons are:
Remove Islands less than 0.2 sq.mms ...
- 135
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2
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154
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How to Show Voltage Inputs Without a Net in EAGLE
when I am creating a schematic in EAGLE I would like the ability to show inputs from another area. I think this should be a possibility, as it is used widely. I have an example of an image below that ...
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1
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40
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Software identification of a DIY (guitarist) CAD application
I know there is a reasonably popular tag for component identification, however I have a question about software identification.
Before I used KiCad (when started with electronics), I used for a while ...
- 14k
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259
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Match Two PCBs Layout and Dimension in EAGLE CAD
I want to create a PCB (name A) where I can put another PCB (name B) on top of it using Autodesk EAGLE. I need to match the PCB B's pads position while designing PCB A.
Here's the picture of PCB B :
...
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2
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3k
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What is the difference between Eplan/Elcad/Autodesk Electrical vs Altium/Eagle/KiCAD?
Recently I came across the programs Eplan, Elcad and Autodesk Electrical. As far as I can tell, they are used to draw schematics. Is it possible to do the same thing with a PCB design software like ...
- 1,616
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1
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59
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Help identifying electrical components
Sorry if this inquiry is it a little bit basic and boring, but I need some sort of help with this, and I am really not sure where to look online. I need help identifying several different electrical ...
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1
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12k
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How to round all corners on a PCB in Altiium
All my PCB's have round corners, so you can't hurt yourself, and so it is easier to fit it into a rack.
Now with altium i always have drag the edges in the Board Shape Editor to make them round. I ...
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174
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What does this symbol mean in PCB Layout?
I came across this USB TX lines in pcb layout. Yet to figure out what do those circles at the joints mean?
- 3,156
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107
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Understanding how PCB CAD designs affect the final product [closed]
I'm looking to design my first printed circuit board and having trouble understanding PCB CAD systems conceptually. I've started on schematics with EasyEDA, KiCAD, and Fritzing without finishing, as ...
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