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Q&A

Posts tagged PCB

Anything related to PCBs (Printed Circuit Boards).

A PCB is a slab of (usually rigid) insulating material on which conducting paths (known as traces) are formed by various technological processes and on which electronic components are placed to form a complete circuit.

The PCB acts both as a mechanical support for the components and as a network of electrical connections between the components themselves.

This tag doesn't have a detailed wiki yet.

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Q&A What are some best practices for library management?

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" libraries where symbols and ...

3 answers  ·  posted 2mo ago by Mu3‭  ·  last activity 2mo ago by [Object object]‭

Question PCB
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Q&A Why are some PCB design software programs considered to be 'hobbyist' programs?

Recently I have heard this opinion from experienced engineers when discussing PCB design software. The common opinion was that Allegro and Altium are supposedly professional programs whereas Eagle ...

3 answers  ·  posted 2y ago by Wilkins Ticklebum‭  ·  last activity 4mo ago by Sclrx‭

Question PCB
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Q&A Ground pour on outer layers on 4-layer PCB

I'm designing a board that contains a cortex-M4 mcu working at 120MHz, and an ethernet bus with a wiznet chip that communicates with SPI. The ethernet chip gives me a phy output that goes directly...

2 answers  ·  posted 5mo ago by DeadMouse‭  ·  edited 4mo ago by Lorenzo Donati‭

Question PCB
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Q&A 4-Layer PCB Routing Question

I am designing a 4-layer PCB that has both analog and digital circuitry throughout it. The analog section involves high return currents as well as ADCs sampling the voltage across sense resistors a...

1 answer  ·  posted 3y ago by jm567‭  ·  edited 4mo ago by Lorenzo Donati‭

Question PCB
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Q&A Cleaning flux out of USB connectors after soldering

When soldering Micro-USB or USB-C connectors by hand, flux is applied generously. This sometimes results in flux getting inside the connector housing, making it sticky and creating high physical re...

1 answer  ·  posted 3y ago by Kranulis‭  ·  last activity 4mo ago by Lorenzo Donati‭

Question PCB
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Q&A Using arc trace routing instead of 45 degree trace routing

Most modern CAD software for PCB design offers arc trace routing or a form of conversion between 45/90 degree angel trace routing and arc trace routing. Despite this, the overwhelming majority of c...

3 answers  ·  posted 9mo ago by Mu3‭  ·  last activity 8mo ago by Lundin‭

Question PCB
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Q&A What is a good PCB-layout?

I am an electrical engineering student and I just finished designing an ECG-amplifier circuit. Here is the schematic: - It is fairly simple. Initially, there is a 1st order highpass filter. Then...

1 answer  ·  posted 8mo ago by Carl‭  ·  last activity 8mo ago by Olin Lathrop‭

Question PCB
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Q&A PCB ground planes with isolated voltage

I have designed a PCB that I need to work in which a microcontroller drives a 24 V brushed motor. The input power to the board is 24 V, this is then lowered to 5 V by a step down converter, and thi...

3 answers  ·  posted 2y ago by Alinik‭  ·  last activity 1y ago by KalleMP‭

Question PCB
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Q&A Press fit PCB receptacle for plated holes (Marked for non-plated holes)

I saw that this PCB socket: Is marked as pressfit for non-plated holes. However, can it be used with plated holes as well, or will it damage the plating inside?

1 answer  ·  posted 2y ago by Wilkins Ticklebum‭  ·  last activity 2y ago by Olin Lathrop‭

Question PCB
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Q&A PCB Copper Layer Spacing & Voltage Rating

One standard used for spacing conductors based on voltage is the IPC-2221. This standard differentiates spacing requirements for inner and outer conductors. Does the IPC minimum separation betwee...

1 answer  ·  posted 2y ago by DavidE‭  ·  edited 2y ago by Lundin‭

Question PCB
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Q&A Why are antenna PCB traces square instead of rounded?

While doing some reading on RF designs I ran across this paragraph: I have never designed an RF circuit, but all the PCB trace antennas I have seen on development boards are square. For example,...

2 answers  ·  posted 2y ago by Kranulis‭  ·  last activity 2y ago by TonyStewart‭

Question PCB