Questions tagged [pcb-design]
About designing the boards which carry the components of an electronic circuit, including placement of parts and routing of traces. 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.
5,407 questions
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Struggling with Single-Layer PCB Design in KiCad [closed]
can anyone design a development board for me using the PIC24FJ256GA705 microcontroller? Or at least can someone provide a basic reference design or idea on how to complete the entire board as a single-...
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First PCB design review — ESP32-S3 driving HUB75E LED matrix panel, single board
I'm building a WiFi-connected RGB LED matrix display. The idea is a single PCB that sits behind a 128x64 P2.5 HUB75E panel, connects to the internet, and pushes pixels.
This is my first PCB. I've ...
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PCB layout guidelines for SDIO at 25MHz
I am currently using a WeAct Studio STM32H562RGT6 development board, and everything is working fine except 4-bit SDIO, which is unreliable if I use a clock divider less than 20 (~2MHz). Ideally I ...
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Guidance on medium-speed SPI bus over backplane
I am developing a system with multiple (four) distinct PCBs containing devices that need control from a central MCU via SPI plus a smattering of gpio and other slower signals. My plan is to connect ...
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Review request: Capacitor discharge pulse driver PCB
I’ve designed a PCB for a capacitor discharge pulse driver intended to energise a coil to accelerate a steel ball. The goal is to achieve a high-current, fast discharge with low inductance and clean ...
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How would you assess the feasibility of a design given the PCB dimensions and total component area?
Recently, I designed a 6-layer PCB (power + digital: CAN, RS-485) where the ratio of component area to board area (both sides, excluding keepout regions) is around 0.55. There are a few through-hole ...
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PCB EMI Filter Layout Conducted Emissions
My question is about how much my LC filter layout matters (copper connections, proximity, etc.), and where should each part of the Pi filter be located (all together, one in each specific place, right ...
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Cannot find SPI Flash Memory IC matching iCE40LP Requirements
I am trying to find a SPI flash memory chip to use with the ICE40LP4K-CM121. In the Programming and Configuration documentation, it states the PROM "must be ready to accept commands 10µs after ...
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Trying to Build a Tire Temperature Sensor: Schematic Review
I posted on here a while back asking for help with my schematic and got (rightfully) fried by the responses. I've been working on it intermittently for the past few months while dealing with classes ...
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Why does Xilinx UG933 use `Z-7020` instead of `XC7Z020`
In Xilinx UG933 Zynq-7000 SoC PCB Design Guide (Table 3-1), the device is listed as Z-7020. However, the actual chip marking (and official part number) is ...
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Zynq-7000 VCCINT Decoupling: Why does the PYNQ-Z1 use a \$100\ \mu \text{F}\$ capacitor instead of Xilinx's recommended \$330\ \mu \text{F}\$?
I am a beginner designing my first custom PCBA based on the Xilinx Zynq-7000 SoC (specifically the XC7Z020-1CLG400C).
While reviewing the decoupling capacitor requirements in the Zynq-7000 SoC PCB ...
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ESP32 Unused Pins & EMI Best Practices
I’m finalizing a PCB design using an ESP32-WROOM-32E module. The board is powered by a 5V Meanwell SMPS stepped down to 3.3V via an LDO.
I have a handful of unused GPIOs left over. I want to make sure ...
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Which parts of PCB or hardware design fundamentally require manual visual layout instead of declarative descriptions? [closed]
Context
I am researching whether hardware systems could be described using a text-based language that compiles into manufacturing outputs (for example PCB Gerber files or chip layout formats). The ...
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20x4 LCD occasionally shows garbage characters when relay switches AC UV lamp [closed]
I designed a PCB using an STM32 microcontroller that controls two 20x4 LCD displays. The PCB also contains a relay that switches an AC UV lamp (~6 W).
Most of the time the LCD works normally, but ...
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Breakout Board Clarifications
I made a PCB for some external units I am working on. Both are nearly identical, besides the fact that one has a DB9 and one is a DB15. It is a pretty simple break out with some connections to BNCs ...
