Questions tagged [kicad]

Kicad EDA is an open source (GPL) software package for the creation of electronic schematic diagrams and printed circuit board artwork.

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39 views

Developing PCB for STM32F765 with 16 MHz crystal oscillator, ground plane isolation and 3.3 V plane

I have developed a PCB in Kicad for the STM32F765 microcontroller. I am using a 16 MHz crystal oscillator for the application. But I am having some confusion regarding the GND and 3.3 plane. As shown ...
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43 views

Layout tips for GND?

Is it OK to not connect the GND pins and at the end I fill the zone with copper pour? When I run the DRC in KiCad everything looks good (all pads are connected.)
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33 views

Multi-layer Via-in-pad with 0.5mm Pitch BGA in KiCad

I am working on a 4 layer board with an 81 pin 0.5mm pitch BGA which effectively requires via-in-pad for dropping down to other layers. Decoupling must be done on the bottom as there is no space for ...
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29 views

KiCAD 5 ‒ Is ist possible for a footprint to have multiple courtyards?

One of the components I am using is really a daughterboard that plugs into two rows of pin headers. Under the daughterboards, between the pin headers, there is space for a additional components. I ...
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34 views

RF Antenna 50 ohm controlled impedance design

this is my first time doing RF design and I'm currently using ThingMagic Nano M6E RFID module and in the process of designing a 50ohm impedance circuit/trace from the IC to the antenna. On their ...
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44 views

Component recommendation for my PCB (probe)

I have completed hardware and software (on the Arduino platform) for measuring resistance on custom sensors. Now it is time to move away from the breadboard and use my own PCB (I plan to make it on ...
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45 views

Inductor calculations for buck converter

I found this application report Basic Calculation of a Buck Converter's Power Stage Q : Can I use this report for products of other companies like ROHM, ALpha and Omega Semi... For the selection of ...
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2answers
206 views

Why can't I trigger my relay?

Solution This issue was caused by the choice of SOT-23 symbol when creating my PCB in KiCAD. As you can see in the picture below, there are a number of symbols associated with transistors in the KiCAD ...
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51 views

Different options when generating gerber/ drill files after PCB designing/ layout

I am generating gerber files for manufacturing of my PCB. I have completed my PCB layout. When generating gerber files/ drill files I am getting several options. What are they? I have highlighted the ...
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1k views

How should I deal with KiCAD Electrical Rule Check warnings?

I have drawn up a modest size schematic in KiCAD, for the first time. It seemed more or less straight forward. But now that I run the ERC error checker, I get boatloads of errors with seemingly ...
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38 views

How to get NAND gate with external spice-model working for simulation in kicad

I am trying to get some logic gates working in kicad-simulation following this Tutorial. I downloaded the 74HCng.lib as described in the above link, and set this library, and the appropriate model (...
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4answers
110 views

Why voltage is shifted in my schematic?

I'm learning basics of electronics and trying to get familiar with the common emitter topology. This is my schematic diagram: When I try to simulate it in Kicad I get this: Everything works as I ...
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46 views

Position components in KiCad for a test rig

I'm designing a test rig for a product. There's a number of test pads and a power connector on the PCB, which I want to match up with a tester device, i.e. the tester PCB should have pogo pins and the ...
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51 views

AC power (220V/50Hz)Track width calculation

I want to control 5KVA heater through atmega2560 . So, I isolated my heater through MOC3020 optpcoupler and triac(BTA24). I am confused to design a PCB of power circuitry part. How to calculate the ...
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2answers
64 views

KiCad placement using coordinate system

I am new to KiCad but have extensive experience with Allegro: The goal create a rectangular board outline that is 55 x 30 mm with the top left corner at x,y 0,0. This is possible in OrCad through the ...
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34 views

How to use transistor models provided as Spice netlists in KiCad?

I would like to use device models provided by EPC for their GaN MOSFETs in a KiCad simulation. The models (https://epc-co.com/epc/DesignSupport/DeviceModels.aspx) are provided as subcircuit Spice ...
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44 views

74HC14 VCC and GND won't connect even with PWR_FLAGs attached to board input connector

Sorry, new to KiCAD so decided to place a single 74HC14 in schematic and single 4-pin connector with VCC, GND, sig input and sig output. Also threw in 5 resistors and 5 capacitors to build a simple (...
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4answers
158 views

KiCad how to export oval PCB hole as a drill file?

Using KiCad, is there a way to have a pad with an slot shape (referred to in KiCad as "oval") be exported properly as a drill (.drl) file? The pad in KiCad looks like Fig. 1 below. But after ...
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1answer
92 views

KiCad component doesn't match manufacturers model

I am trying to incorporate the ADA4898-2 into my simulation. The KiCad symbol shows up with only 3 pins: 2 input, 1 output, while the actual op amp has two more supply pins: +Vs and -Vs. If I try to ...
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1answer
42 views

ngspice keeps reporting an unknown parameter

I built a circuit in KiCad to simulate the behavior of the Maxim MAX3665. Here is the circuit: ...
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1answer
32 views

positive voltage from non-inverting amplifier is cut off

I'm experimenting with simulations in Kicad and have weird behaving output voltage and input current. R2 is being tuned in the simulation window to 2k. I'm using TL082 as the subcircuit for the opamp. ...
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1answer
52 views

Connect a DC/DC converter to a virtual precision ground in KiCad

I'm trying to design a circuit which steps up 5V to 12V using a DC/DC converter and then use a virtual precision ground TLE2426 to split the 12v to +/-6V. I'm using this design in KiCad: I'm having ...
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2answers
67 views

KiCad Eeschema Annotations: Prevent numbering for certain components?

I'm a music electronics hobbyist, and am in the processes of switching from Eagle to KiCad. For some components — particularly potentiometers — it doesn't make sense for the name/reference property to ...
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1answer
39 views

What is an epad in SIM MFF2 layout

I found a Kicad model for SIM MFF2 on the web that I wanted to use in my project but I don't know what is EPAD pin and how to connect. EPAD is this central biggest pad on the right image. Does anyone ...
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2answers
136 views

KiCad ERC (electrical rules checker) error. Why?

I recently got into PCB design with KiCad and am a beginner. I am trying to make a portable phone charger, but for some reason keep getting this error: I'm assuming it is caused by the fact that I'm ...
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1answer
61 views

How to center a large symbol on the origin in KiCad

In Symbol Editor I drew a quite large symbol for an MCU. I want to center it (I mean the rectangle that define its symbol) on the origin point. I cannot find a way to do this precisely. I'm using ...
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4answers
3k views

How do I separate ground planes on a PCB with two different voltages?

I am using a four-layer PCB with the following stack up: top signal, ground, 3.3V VCC, and bottom signal. All of my components require a 3.3V input except for this sensitive optical sensor (MAX30102) ...
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2answers
100 views

How can I create one PCB that I can plug-in to two different places in a mother PCB?

I believe there are many answers to this question, but I would like to have one that works best in KiCad allowing me to run the rule check for all the involved schematics. What have I tried: On top of ...
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3answers
125 views

KiCad footprint or supplier footprint?

I download symbols and footprints from the component supplier into a project's library to go faster but I realized that many of the standard components footprints are slightly different in KiCad, like ...
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45 views

KiCAD Track Connection Fault

I am designing a board on KiCAD and I am facing an unfamiliar issue. Most of the pad connection is done successfully but a few pads cant be connected. While I am starting a new track between pads, all ...
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1answer
41 views

Why is ngspice showing current as negative?

I have an extremely simple comparator circuit: The voltage at pin 7 goes into positive saturation when a positive input voltage is presented at pin 5. I'm simulating this using SPICE in KiCad. ...
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1answer
32 views

KiCAD merge two different copper planes together

I have a design with different copper planes, for example, a ground plane and a VS copper, on the bottom size. But KiCAD overlays both copper planes and throws ...
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1answer
91 views

Incorrect orientation of components in Footprint Position File (KiCad)

I am using a PCB(A) factory where they have an online system where you can get a preview of your PCBA once you upload your files. As part of the process, I have to upload the Gerbers, the Bill of ...
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2answers
105 views

Is there any way of replacing components symbols systematically in KiCad?

I'm drawing a schematic in KiCad which has a lot of capacitors and resistors. Now i realised that for the sake of tidyness and to make it easier to read it would be nice to have those caps and ...
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2answers
104 views

Difference between junction points in old schematic

What's the difference between the black circle and the white one in this old schematic? Of course the black ones are junctions, but are the white circles a pin, or an input of some kind? I'm trying to ...
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45 views

Why is the electrical type text of a pin always shown in KiCad V5?

I'm taking my very first steps with KiCad and found that when I am editing a new component the text of the electrical type assigned to the pin is always visible. Is there any way to remove it?
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1answer
35 views

addition of external footprint to ki cad

I have downloaded a .stp file of MAX14878 foot print. I tried to add it to the library through manage footprints options. It shows a table where it is added. But I am not able to find it during edit ...
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2answers
1k views

What is a 'piano THT' footprint for?

What is the 'piano' THT footprint for? Are these used for signal probing? See the second layout, as different from the first (KiCad ScreenGrabs).
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69 views

How to have both PCB components and external components in the same KiCad project?

I am using Kicad (5.1.4) and would like that the schematic contains all the component wiring required for a PCB board as well as the wiring for components external to the PCB board (such as switches, ...
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1answer
51 views

copper layers of different sizes inside PCB (KiCad)

I am trying to design a PCB where the device is sitting on an elevated pedestal (or island) on a PCB, like the image shown here. I have spoken to a PCB company about how to achieve this, and they ...
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1answer
48 views

Connecting an external switch to my circuit

I'm pretty new to electronics and kicad. I would like to understand how to add a physical switch to my circuit using molex connection. I'm adding my initial schema.
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1answer
75 views

How to integrate external library into KiCad

I am using KiCad (5.1.5). I got this self-made library from my lab mate he told me to make some changes to his schematic. Inside the folder that he gave consists the following folders and files: ...
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2answers
460 views

CircuitMaker to KiCAD?

I had so many problems with CircuitMaker (Free version of Altium), that I never want to use it anymore. The problems I had so far: Very cumbersome to deselect trace mode in PCB mode (having to get ...
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3answers
140 views

Driving RGB Leds from ESP8266

I want to create a schematic for the following behaviour: I want an ESP-12e (ESP8266) microcontroller similar to an arduino, to be able to control 10 RGB leds , changing their colours from blue to ...
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4answers
160 views

Freerouter doesn't want to route to inside an FPGA

Prefacing this by saying I'm entirely new to designing electronics for a PCB and I've only worked with breadboards before, so if there's more that I'm doing wrong in my project besides just the PCB ...
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1answer
141 views

How to fix a short circuit?

I found two vias that were supposed to connect to two leads of a capacitor were shorted together on a 4-layer PCB. One of the vias is connected to ground. They are not shorted in the KiCAD model (...
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1answer
100 views

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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1answer
116 views

KiCad: Can I insert a net name into a footprint?

I'm new to KiCad, and using version 5.1.5. I want to make a simple single-pad footprint, with a text label that is the net name to which the corresponding schematic pin is attached. Is there a way to ...
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1answer
869 views

Kicad Eeschema window does not respond when opened in windows 10 (Not working)

I have just started with Kicad. Never used it before. I downloaded and installed kicad, opened it, created a new project. Everything is fine until that point. But when I open Eeschema window for ...
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2answers
111 views

Why won't zones flood into vias or other plated through holes that are part of a footprint in Ki-CAD

I am using KI-CAD. Visible in the picture is a GND_USB plane (yellow) on layer 2, and also the top layer (red). I have a QFN package with an exposed pad in the center. For some reason the ground ...

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