Questions tagged [altium]

Altium is integrated schematic capture, PCB design and FPGA software.

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Un-Routed Net Constraint in Altium

I'm new to Altium, and trying to do a simple design, that doesn't do anything :) Anyway, after running DRC (Design Rule Check) I got "Un-Routed Net Constraint Violation" on some pads and ...
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Can't place components in Altium Designer 22

I'm new to Altium Designer (v. 22.6.1) and I'm trying to create my first designs with it. Didn't get very far, though. I'm trying to place components from the "Components" panel, but I'm ...
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Altium Single Layer Mode - Vias Color

After I last updated Altium, there has been a change of behaviour. When using single layer view, the vias now blend in color with the other tracks, which is sometimes confusing. Is this expected and ...
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Altium Minimum Solder Mask Sliver error within thermal pad

I am designing a board with the DRV8837 IC, which has an 8-WSON package with a thermal pad and 2 vias. When running the DRC, I am getting the following error: Minimum Solder Mask Sliver Constraint: (...
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Altium designer - Keepout region with holes in it

I have a component which has a cavity on the bottom (the side that meets the top of the PCB). How can I create a keep out region which spans the outline of the component, excluding the cavities? I ...
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Paste layer and solder mask layer

I didn't realize this when designing in Altium. However, after transferring my schematic to the PCB, I realized that the paste layer is larger than the solder mask layer. Is there a problem if I don't ...
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How to drop a via on Altium without Numeric Keypad?

I have a small keyboard without numeric keyboard. Unfortunately, the only way I found to drop a via is to use the * keystroke. Is there an alternative?
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Fundamental question on Signal Integrity analysis

I have a gate driver PCB of which I want to do a signal integrity analysis. I thought I would use the Signal Integrity Analysis tool in Altium, and I tried running it. None of the nets were analysed ...
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Do I need a GPS simulator to design a device that contains a GPS receiver and a pre-designed antenna?

I have designed a device using an STM32 Nucleo board, a GPS module, a GSM module, some discrete components, and a bread board. It is a sort of a car tracker. I have decided to design my own custom ...
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Altium - Polygon pour into a cutout

I'm using Altium Designer 22 to design a PCB. On the top layer I have a ground plane with a hole in the middle. I made the hole by using a polygon cutout. Now, I have to pour into this cutout region ...
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Can I double the circuit on the same PCBDoc using Altium Designer?

Can I double the number of components for a PCB while having a single schematic in Altium Designer? I want to make a two same circuit on the same board. Or should I recreate the same schematic to ...
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How to update all the parameter set nets at the same time

I made design rule for the power nets to ensure the minimum track width was being achieved. However, when I wanted to changed the rules, I had to go through each of the parameter set icons and update ...
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What is the correct way to use multi-part schematic symbols in Altium designer?

I have a library containing FPGA schematic symbol and related footprints. It has become clear to me that the scheamtic symbol is not unified but split into multiple parts. These parts represent ...
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Altium Schematic - save all sheets as ASCII schdoc

I see a way to save as in Altium to save the sheet in ascii format. Will this save all sheets in a hierarchical design or flat design? https://www.altium.com/documentation/altium-designer/sch-dlg-...
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Altium part has hidden rectangles causing it to overlap other components

I downloaded an Eagle LBR file of an RP2040 WIO and imported it into Altium. When adding it to my PCB, I cannot fully move the component into the corner as it thinks its footprint is bigger than it ...
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Altium designer routing blocked by old board shape

I am trying to re-route my board, so I changed the board size using the "board planning mode". Now, I'm routing, and some tracks are "blocked" by something looking very much like ...
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Altium Variant Problem

I have variants in schematic sheet. You can see the enclosed picture. But when I right click on the Project -> Variants there are no variants over there. But I can see the schematic sheet. How can ...
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How to implement a Bookbinder PCB design in Altium

I am planning to design a bookbinder with airgap rigid flex PCB using Altium. Based on guidelines from Altium, and various other sources, it is important to have "staggered lengths", to ...
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Altium gaps/whitespace in TrueType characters

I'd like to use Work Sans for text on my PCB design, however Altium is showing some artifacts in the font that appear as white spaces within characters. This only happens on some fonts but not others. ...
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How to remove tenting from specific vias?

I defined a SolderMaskExpansion rule in Altium and with that way all vias are tented. But I want to remove tenting for some of the vias. I mean, I want some vias to be tented and some vias to be non-...
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Altium designer PCB - Strange and confusing symbols everywhere (From DRC - Design Rule Checker)

I'm starting to learn Altium Designer, and I have this on my PCB screen: I've tried several things, but nothing works. Here is the same image, I just moved the components away: Can someone explain ...
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How can I place components of my amplifier design between the pads of an SMA connector?

I want to place some of my amplifier components between the pads of an SMA connector. Should I change some design rule or is the problem in the choice of the right footprint? I added an image of my ...
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Offset paste mask from pad on altium

As you can see in datasheet at page 18 of the datasheet the stencil aperture on the right has an offset of 0.1 from each side. I thought it was a typo but after contacting with sensirion they replied: ...
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How to measure distance between two pads' solder-mask clearance in Altium

I'm new to Altium and want to measure distance between two pads' solder-mask clearance using Reports-->Measure. I tried activating solder-mask layer only and then tried to measure like regular ...
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Dynamically Adapting Routing Width

Background I'm fanning out and routing controlled impedance tracks underneath a BGA. The stack-up predetermines that a 50 Ohm track must be ...
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How can I adjust the imported 3d body in Altium designer?

I've downloaded and imported the following SMPS transformer 3d model into Altium designer but it doesn't fit my footprint how can I adjust it by changing scales and moving pins?
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Exported same file in Gerber X2 and ODB++ and diffrent result

Using Altium I exported the same PCB in Gerber X2 and ODB++ and sent it to production (so they could choose what file format they preferred). The manufacturer came back asking why the design did not ...
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Why does Altium Designer not detect the GND node?

I'm trying to set up a project simulation in Altium Designer. I have some circuits across two sheets: As you can see, I included a separate analog and digital ground. I connected them in order to ...
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Why does Altium not permit changing net names from schematic view?

Here is a short snippet from the schematic view showing the righ click menu from a net and the net properties: Altium shows Physical name and Net name for the net. However, there is no way to modify ...
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Plane layer thermal relief rotation with Altium?

It is straightforward to configure horizontal/vertical thermal relief connections with polygons, but with Plane layers, it seems the option isn't available. The result is not very professional (see ...
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Selection filter shortcut in Altium

In Altium, is there a shortcut to bring up the selection filter menu at the cursor? This is the menu I want: I want there to be one, exactly like there is one for the snapping options by pressing <...
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How to create rectangular cut slots in PCB footprint?

Here is mechanical drawing page from datasheet of the PJ-037BH DC Power Jack. The drawing shows that there must be rectangular cuts into the PCB for this component to be fitted and soldered. This ...
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How does Altium designer decide the size of the solder mask?

Here is a footprint I created using the footprint wizard in Altium designer. The red is top layer pad. The purple is the top solder mask. Whenever I change the top copper pad size, the solder mask ...
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Does altium have common symbols?

Does Altium have common symbols such as opamps, diodes, capictors, inductors that one could use to make their own symbol? Seems like an obvious thing to do.
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What to do when the part datasheet gives the SMD part dimensions but nothing related to PCB footprint dimensions?

This is from datasheet of Panasonic SMD resistor ERJ-8ENF3000V. The datasheet can be found here. The page 4 of the datsheet shows this: While the part physical dimensions are given, the actual SMD ...
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Why does this LED have three PCB pads in the data sheet?

Please see this datasheet here for QBLP615 LED. The LED part top and side views are contained on page 3. The recommended PCB footprint is shown on page 9. Why is there a middle pad in the footprint ...
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What is the correct approach to creating library of similar parts?

When coming to components like LEDs, resistors, capacitors e.t.c there are throngs of manufacturers and suppliers that provide parts that are very similar from PCB design perspective i.e the schematic ...
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What does location actually mean in the Altium part providers preferences?

Please see the option inside the red box: I am unable to find what exactly is meant by "Location" for a part. Is this: Location of manufacture Location where it is stocked Create by an ...
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How do I place a component in the center of the board? Altium

I'm attempting to align some components, such as an OLED display and a push-button, to the pcb board's centerline. The board was imported as STEP from Solidworks and has a non-uniform format (not a ...
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Altium route to plane

in the past I always used internal Signal layers, on which I created huge GND polygon planes as a ground plane. However, there are actual solid planes definable in Altiums Layer Stackup Manager, which ...
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Wire ends avoiding each other when trying to connect as well as going around pads instead of connecting to them

I am working on altium designer v20.0.13 and for some reason when I am trying to connect the components with routes the routes are avoiding each other when I am trying to connect them together as well ...
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Altium designer clearance constaint Between track on toplayer and pad on toplayer

I am a student and i want to design a PCB. I am using Altium Designer 22 and I selected 0.5mm for clearance constaint rule but i got this error. If i select 0.3mm i still got the same error. How can i ...
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Run DRC within a given area only

Background I often design PCBs by pre-placing certain hierarchical blocks first. I pre-place multiple ones of these then choose one of them and start wiring things up inside it, adding the necessary ...
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Adding parameter to Altium library via Excel or script to entire library

I have a library (Altium) of more than 30000 symbols (schematic). I want to add 3 parameters (MFG, MFG_PN, and Digikey_PN) to the entire library. How can this be done via script or any other possible ...
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What is the actual purpose of pad via library in Altium Designer?

The Altium Designer has schematic symbol library and PCB footprint library. I understand both of these. However, there is a third one called pad via library. Pad is the exposed copper on PCB where a ...
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How to connect pads to split plane (internal plane) in Altium CircuitMaker

My problem: I use Altium CircuitMaker (Version 2.1). I am designing a four-layer PCB; two signal layers (top and bottom), and two internal layers (GND and PWR). I do not connect anything (not any pads ...
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What is the difference between "Port" and "Off Sheet Connector" in Altium Designer?

When doing schematic design in the Altium Designer, the Place menu contains these entries: The 'Port' and 'Off Sheet Connector' can both be used to cross reference things on other pages of the ...
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Altium Polygon Pour automatically assign net

I recently started extensively working with polygon pours. It's not my first time using them, but at the moment i'm doing whole pcb's with them, mainly for thermal reasons. Whenever i place a pour, it ...
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2 votes
2 answers
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Can't use a polygon to define a board shape in Altium. How to do it?

I have this small single layer LED PCB I created in Altium, with a Polygon poured on the top layer defining the board limits. When I try to create the board shape by using the polygon as reference, ...
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Altium designer Ignoring Pin mismatch between schematic symbol and footprint while importing the design to PCB

I am trying to import the schematic into the PCB doc in Altium designer and found that it is not showing any error in eco for the mismatch in the pin count between the schematic symbol and footprint. ...
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