Questions tagged [pcb-design]

About designing the boards which carry the components of an electronic circuit. For questions about getting them built instead use PCB-fabrication. If your question is specific to a certain CAD tool, say which tool and version you are using.

Filter by
Sorted by
Tagged with
0
votes
1answer
287 views

Can't update my schematic to PCB layout in Altium

I have finished my schematic for an echo circuit using PT2399 IC as per the application circuit in datasheet. I have downloaded the part (including footprint) from snapeda.com and updated my Altium ...
3
votes
2answers
150 views

How to design a CMC (Common Mode Choke) footprint to allow no-pop solution

How would you design in CMC's with a 0504 (1210 metric) 4-lead package to allow for a no populate (do not pop, DNP,DNI) solution? I am thinking 0402 0ohm (zero ohm) resistor but cannot picture the ...
0
votes
0answers
26 views

How can I make my own USB Joystick Encoder PCB and my own program which allows me to easily edit what the buttons do on a PC [duplicate]

I have previously used an Arduino Pro Micro to make button boxes for my computer which do functions such as type my password or copy something. I was wondering how I would design my own PCB which does ...
0
votes
2answers
76 views

How to connect the GND with the metal case of the robot

I have a PCB design inside a metal case of the robot. The robot is mobile, it moves on wheels. The problem is how to connect the GND with the metal case of the robot. Direct connection is not safe, ...
0
votes
1answer
77 views

Is it feasible to manually draw from scratch a 2-layer PCB inside HFSS

I am trying to replicate a new planar marchand balun Is it feasible to manually draw from scratch a 2-layer PCB inside HFSS ? Or should I use external PCB drawing tool such as Kicad or Altium, then ...
0
votes
1answer
88 views

PCB Panelization Impact

What is the impact on a PCB design if it is panelized? I received a message from a PCB manufacturer: In your order, the quantity of boards is large and the boards are quite small. Can we panelize ...
3
votes
0answers
122 views

PCB Layout - Ground Plane Clearance Around and Under Ceramic Resonator

We are using Murata's 4MHz Ceramic Resonator (CSTCR4M00G53-R0) in one of our designs and request help in PCB layout design around Ceramic Resonator. The below Murata's FAQs page suggests not to place ...
1
vote
1answer
210 views

( How-To ) Ultra Low-Profile PCB Stacking [duplicate]

Recently I found myself needing to stack two small circuit boards on top of each other for a modulation project. The problem is that the areas I want to connect together on the two boards have no ...
1
vote
2answers
124 views

Surface Mount Resistor Clip?

I have a goofy idea: a user is given a PCB and a pack of surface mount metal film resistors. To configure the board's settings, the user places various combinations of resistors into several 'sockets' ...
2
votes
1answer
127 views

Toy “pull tab”-style feature on PCB

I have recently designed a passive-based modular PCB. When I click the secondary board into the base board, I would like it to break the current circuit at a fixed point, and insert itself in series ...
24
votes
3answers
8k views

Odd PCB Layout for Voltage Regulator

I am reverse-engineering a board which has a Xilinx Spartan 3E FPGA, with VCCAUX powered by a 2.5 volt regulator. Below is the PCB layout for the regulator part of the circuit, and something seems ...
2
votes
4answers
136 views

Securing mod wires to PCB

I have done a few mods to a PCB with 36 gauge mod wire. Obviously this wire is so thin that it only takes a few bends back and forth to break it. What is the best way to secure this in place on the ...
6
votes
1answer
458 views

What are the advantages and disadvantages of Manhattan-Style routing?

Manhattan-Style routing being the use of expressly east-west planes and north-south planes, using a via and changing planes when a signal changes direction. Comparing to freestyle routing, which lets ...
16
votes
3answers
3k views

Why do some PCBs have exposed plated perimeters?

I've seen a number of PCBs, largely high speed and RF boards, that have exposed copper, either at the perimeter of the entire board, or in various sections, often with stitching vias. I've never ...
5
votes
5answers
2k views

Does anyone have problems with micro USB connectors on PCB?

In a PCB I've been developing, I included a micro USB connector. The problem is that when I plug in and out cables on it, seems to get weaker and weaker and needs to be resoldered, even the pins on ...
1
vote
1answer
46 views

Representing Heatsinks on board layout

When using CAD software to draw board layouts, is there any convention on how to represent heatsinks attached to, say, some power transistors? I want to make sure they don't interfere with one another,...
0
votes
1answer
184 views

How do you make crossing wires not connect in EAGLE? [closed]

I am brand new to PCB designing (started yesterday) and am doing it as a fun little side project. My goal is to produce a working PCB that has a very basic function. My problem is this: I have no ...
6
votes
4answers
1k views

For decoupling an IC's power supply pins, is there any reason to use multiple capacitances when all the MLCCs have the same package size?

A PCB I'm working with has three decoupling capacitors on an IC's Vdd pin - 0.01uF, 0.1uF, and 1uF. They are all in 0402 packages. I understand that capacitors of multiple sizes are often used ...
0
votes
2answers
126 views

Implementation of a coplanar waveguide in the design of a Butterworth filter

I am trying to build a Butterworth bandpass from 130MHz to 140MHz (approx.). As I have already worked with microstrip lines of transmision, I wanted to give coplanar waveguides a try, as in the future ...
0
votes
2answers
88 views

Atmega328p mounting options

I am developing a product that uses the Atmega328P (currently using Arduino nano as the development board). I would like to keep the software private, but also have the option to update it during the ...
0
votes
0answers
41 views

How to design signal return paths relative to bypass capacitors and IC power pins?

I'm working on a two-layer PCB with some analog and digital elements, as well as an ethernet chip (ENC28J60). I've placed and routed the bypass capacitors for the chip, but now I'm wondering what's ...
4
votes
2answers
67 views

POWER MOSFET - Thermal Design

i have some doubts about with this thermal design? first, the calculations and infos: My load (a motor) uses an average current of 7A, I could not measure the current peak at the beginning of the ...
1
vote
1answer
146 views

1/4 wave monopole PCB antenna design

I followed the below procedure to design a 700MHz 1/4 wave monopole PCB antenna. Is this correct? ...
0
votes
1answer
82 views

PCB Ground Plane and Redundant Connections to Common Ground

This is a question borne of sheer ignorance, but I'm not sure if it's a good or bad thing. I'm designing a PCB (1) that will connect to another PCB (2). The latter has all of the power, ground, IO ...
3
votes
1answer
184 views

Zigbee PCB layout - bad signal reception

I'm using Atmel's ATMEGA256RFR2 (link) for Zigbee (802.15.4). However I could not reach more than a few meters of range between my nodes. Here is the antenna design layout and schematics I'm using, ...
0
votes
1answer
46 views

Wire gauge and combined wires for 3D printer hotend through PCB

So I've been designing a wiring harness PCB for my 3D printer to provide connections and easily swappable tools. I settled on a TE 34-pin connector to use as input on the PCB. The current design ...
1
vote
1answer
162 views

Are there PCB connectors capable of suporting more than 3.5kV of working voltage?

I was thinking of a design for bringing VCC+ and GND to a board through a PCB connector. VCC = 6 kV. It comes from external source towards a banana jack within a metal case. The first idea was to fit ...
3
votes
1answer
117 views

How can be creepage between two conductor points be determined for HV pcb design?

I have read about spacing at HV design and it seems to say that there are two main standards to be followed: IPC or UL (IEC). IPC is a generic and commonly used. But UL is the best option for designs ...
0
votes
2answers
548 views

How to import PCB 3D model (step file) designed in MCAD software in Altium and place PCB footprints, and route it?

I have my PCB board from Mechanical Design software as a Step file. Now, I want to import it into Altium Designer and place PCB footprints, and do the routing etc. I am looking for some guidelines or ...
2
votes
1answer
193 views

How to program STM32f411RE chip?

I've developed a prototype using the STM NUCLEO (NUCLEO-F411RE) board and now that I am happy with design I am now in the process of testing everything together on my own PCB. All the other components ...
1
vote
2answers
131 views

How above should a through hole transistor sit on the PCB?

I´m soldering a self-made H bridge with several 547 and 557 TO-92 through hole transistors and I don´t know how high from the PCB should I solder the transistor. I found a tutorial just telling that ...
-3
votes
1answer
92 views

Manually place a few vias in Altium

I placed a few vias manually. I get "Un-Routed Net Constraint." How can I fix that?
9
votes
3answers
2k views

Unrecognized IC Package Style

I'm implementing the NXP TDA19988 HDMI transmitter IC in one of my projects and I am currently in the PCB design stage. I am building my component library and when I came across this part I wasn't ...
1
vote
1answer
75 views

Ground vias and completing a board

I'm very new to the world of EE and PCB design. A friend and I decided to make an LED matrix as an easy stepping stone into these areas. We breadboarded the entire circuit and copied the design over ...
0
votes
1answer
72 views

Is it a routed slot the same than creepage concept and how to calculate slot width?

I was reading a high voltage pcb design guide and it talks about insulators insertions, routed slots, gradient rings, etc.. but it doesn't talk about creepage. As the creepage could be achieved by ...
1
vote
1answer
80 views

LT3092 and large guard rings

I'm designing a resistance measurement device using an LT3092 current source. I've used a DIP switch to select different current ranges, which switches in different sense resistors. The LT3092 uses a ...
2
votes
2answers
73 views

4 layer board back bypass capacitor power plane connection guideline reason

I'm reading Power Bus Decoupling Guidelines for Printed Circuit Boards with Widely Spaced Power Distribution Planes. And they have these recommended connection configurations for bypass capacitors ...
2
votes
1answer
106 views

In OrCAD PCB Designer how do I get the trace width of a signal

In OrCAD PCB designer, how do I see the trace width of a signal? When I click the "i" or "Show Element" icon it gives me everything but the trace width.
3
votes
0answers
67 views

Differentiator circuit sees noise on PCB after 2 min

I'm new to PCB design, and looking for some advice. I designed a PCB shield and I'm seeing a lot of noise in my differentiator circuit. The circuit will run perfectly for about 2 min and then all of ...
1
vote
0answers
44 views

analog and digital ground connection point selection

I've read some articles that say the connection point of digital ground and analog ground should be at the power supply output port. However, when there are two or more power supplies which are ...
0
votes
1answer
138 views

crossing 240 V traces on both top and bottom sides of a 2 layer PCB

My situation is the same as the crossings encircled in white from Can I place 220V Live traces on top and bottom of PCB? Therefore, running Line traces on the top layer and Neutral traces on the ...
1
vote
1answer
92 views

PCB Solder Mask textures

In the example image below the pcb is shown to have a textured honeycomb like mesh texture on the solder mask. My question is how would one go about creating a textured finish to the PCB like seen in ...
0
votes
1answer
65 views

Understanding PCB footprint for ESD321DPYR

Looking at the datasheet for component ESD321DPYR, the PCB footprint looks something like this (copy and paste from page 16): However, the footprint I downloaded from Library Loader here, a trusted ...
0
votes
0answers
43 views

Figuring out Inductance

I am trying to figure out the Inductance used on this PCB. I know it's value but need to understand what type of inductor it is and other things so I can order it. The code on it ...
2
votes
2answers
165 views

USB Routing: Switching layers during routing

I'm working on a standard 4 layer board that involves USB 3.0. I have to route the SS TX/RX pairs as well as D+/D- pairs across a 2.8" PCB. I have found multiple calculators that provide me the ...
1
vote
0answers
61 views

Altera/Intel FPGA Interfacing External Memory

I am in the process of making a prototype PCB with an Altera Cyclone IV or V FPGA and 2 channels of external memory, one channel for a softcore CPU and one channel for a 2d graphics accelerator. I ...
12
votes
2answers
290 views

What is reasoning behind the common wisdom of limiting the temperature rise of a PCB trace to 5/10/20°C?

When deciding on the trace thickness required to carry a certain amount of current on a PCB, the answer depends on how much temperature rise you are willing to accept. This leads the designer into the ...
0
votes
1answer
84 views

AC power tracks, PCB design guides

I was wondering about this board Im reviewing. Theres a switching power supply module in this board (red rectangle). switching power supply used: https://pt.aliexpress.com/item/220-v-a-3-3-v-5-9-12-...
2
votes
0answers
82 views

TDA7294 blew up [closed]

I have created this schematic connection of TDA7294 on and had a PCB solution. Connected to power supply +-25VDC. But at first start the TDA7294 blew up without any load on output pin. I started check ...
3
votes
1answer
272 views

PCB Layout - Common Mode Choke

Why it is recommended to not to add copper planes and to avoid routing of signals under the common mode chokes?