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.
5,364 questions
-1 votes
2 answers
52 views
How to access the AFE4960 register map?
How to access the AFE4960 Two-channel ECG analog front end with integrated respiration and pace detection register map? Why doesn't TI company provide that directly?
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0 votes
0 answers
54 views
Seeking Solutions for Turn-On Overshoot When Driving Large Capacitive Loads with CC/CV Supply via H-Bridge
I have designed a 9V, 2.5A constant current/constant voltage (CC/CV) power supply based on TI's TL431/TL431W reference design ("Designing CC-CV Feedback Circuits With the TL103WB"). The ...
- 79
10 votes
2 answers
716 views
SPI bus layout with 8 slaves
It's my first time working on a board with more than 2 slaves on SPI bus and I'm not sure if I'm doing it right. Also, I can't find any clear instructions how I'm supposed to do layout. The SPI clock ...
0 votes
0 answers
50 views
Can copper tied to a disabled SMPS output cause EMC issues on a PCB
I have a PCB where a copper pour is connected to an SMPS output (3V3). The SMPS is normally off and only enabled when needed. When it’s off, this copper is not actively driven. Can this copper behave ...
2 votes
0 answers
80 views
PCB antenna design
I'm working on designing a PCB which uses a LLCC68 LoRa module with a stamp hole antenna. I read DN023 by TI and AN5407 by ST. The datasheet of the module says on page 9, circular traces should be ...
- 21
0 votes
1 answer
140 views
How to get around the massive width requirement for the copper traces of an ESC?
I am designing an ESC for a quadcopter drone that should be able to handle 20A continuous. The problem is when I check the width requirement of the copper traces that carry the 20A based on the copper ...
- 537
0 votes
2 answers
185 views
USBC to UART: copper pour on PCB
I have designed this USBC to UART converter And have already sent it for manufacture - but am second guessing the design, as I have been watching videos about using ground pour to reduce noise. Will ...
- 643
-1 votes
1 answer
87 views
Finding a short in a PCB project (nrf52840)
I've recently gotten myself some PCBs for my first project. I've wanted to build a wireless mouse. I was debugging the nRF52840 (from ebyte https://www.ebyte.com/en/downpdf.aspx?id=445) with OpenOCD (...
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1 vote
1 answer
79 views
Is this split-ground + star-connection approach safe and effective on an 8-layer mixed-signal ECG board?
Dense 8-layer mixed-signal ECG board (90×60 mm, ~1100 parts). Physical analog/digital separation is impossible – everything is mixed. Stackup plan: L1: Top mixed L2: Solid DGND L3: Power L4: Routing (...
0 votes
1 answer
74 views
Prepreg thickness
I was going through Henry Ott's book, chapter 16, which speaks about EMI EMC for PCB. It says that two traces close to each other can have crosstalk and to avoid it, route the traces away from each ...
- 579
1 vote
1 answer
81 views
Do I need a bulk capacitor for a 30A 4S drone ESC?
I am designing a 3-phase BLDC ESC for a quadcopter drone powered by a 4S LiPo battery (VDD = 16.8V). My design uses an STM32F103C8T6 MCU, UCC27712QDRQ1 gate drivers, and AGM403AP N-channel MOSFETs. In ...
- 537
0 votes
0 answers
31 views
Unexpected ADC Voltage on Idle Channels in an STM32-Based Multi-Charger Current Sensing Circuit
I have mounted 4 mobile charger modules, which are switching power supplies, onto a single PCB. In my circuit, I’m also using an STM32 microcontroller, and I have enabled 4 ADC channels to read ...
1 vote
1 answer
105 views
STM32 PCB Review 4-layer
This is my first PCB and I just wanted a review or maybe some tips. Its a STM32 PCB with a USB connection and Micro SD card slot. Its a 4 layer with a SGGS stackup. I was just looking for a review or ...
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-1 votes
0 answers
40 views
Looking for Feedback on My 4-Layer PCB Design With Chip Antenna (Screenshots Attached)
I'm working on a 4-layer PCB that uses this 2.4 GHz chip antenna, and I'd appreciate some expert opinions or comments on the layout. This board will be used for Wi-Fi/BLE, and I want to ensure good RF ...
- 43
0 votes
0 answers
119 views
PCB check: individually addressable LED strobe
I’m working on a circuit board for amber strobe units to be used in a car. Each board will feature eight individually addressable LEDs, controlled by an ATtiny microcontroller. In certain ...
