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Questions tagged [pcb-design]

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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.

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For a university project, I am trying to design a system capable of locating uplink signals emitted by mobile phones. The Constraints: I need to scan different frequency bands corresponding to various ...
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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 ...
Alireza ganjeh's user avatar
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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 ...
PeppersONLY's user avatar
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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 ...
JD1910's user avatar
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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 ...
Enzio Ardesch's user avatar
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I get error when i try to switch from sim1 to sim2 via "AT+SWITCHSIM=1" command @ SIM7672SA How can I fix this, or does the firmware not support dual SIM despite the hardware doing so?
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I have made alot of progress updates on my flight computer since I last made a post. I have a few questions now after completing my most recent version of the board, but first I will share with you ...
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I was wanting a schematic review of my DAC-AMP using the XMOS-XU316 over I2S with a ES9039Q2M. Any input would be appreciated. The specs of the DAC are: 32 bit 768kHz Sample rate Here is the full ...
Luke S's user avatar
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I will be designing a PCB layout for a LoRa module very similar to this one, but with a chip antenna instead of a U.FL connector. It seems that this one has a pi matching network for matching the ...
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I’m having an issue with the RTC on an STM32H743BIT6 on a custom PCB. The VBAT pin is connected to a battery (CR2032). I set the correct time and date in the MCU, then power off the main supply. After ...
Grzegorz's user avatar
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I'm designing an ESC that includes a buck converter (16.8 V down to 3.3 V) and an LDO (16.8 V down to 12 V). The ESC receives its 16.8 V input from a 4S LiPo battery, but the battery is first ...
Robert's user avatar
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4 layer board. V+/- enter at one end. I've got space along the back edge for pours forming a shared supply bus for multiple loads. Loads are all SMPS with fairly stiff transients. V+ goes in on the ...
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I have a problem with this circuit on a PCB I just made. The output is designed at 3.3 V. But, I have a reading of 6 V on the output and a reading of 1.1 V on the FB pin (0.6 normally). This is with a ...
Mattias Vinet Larouche's user avatar
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Let's say you have a 150V trace on an internal layer, and an adjacent internal layer is a ground plane. According to IPC2221B you would need the layers to be about 8 mils apart. Is that correct? Or is ...
charles's user avatar
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Does anyone know best practices for routing these types of connectors? My problem is that this type of connector requires vias. Firstly, I can't place the vias far apart from the D+ and D- pins (they'...
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I am planning to use one of the CAA573 "Megacap" capacitors from TDK, the CAA573X7S2A476M640LH. According to the datasheet, the following land pattern is recommended: Length(L) 6.00mm ±0....
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It is one of my first times creating a footprint. I have this BCT40T series DC/DC converter that has a THT footprint. My question is... since it shows it as bottom view, does it mean I have to mirror ...
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This is the first time I'm doing stuff with RF and I am using the STM32WL30KBV6. I plan on using it for LORAWAN communication but I'm having trouble figuring out what passive values I should be using ...
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I’ve designed a custom IoT board based on the ESP32-S3-WROOM-1, and I would like to have the schematic and PCB reviewed before fabrication. Main features: 4× PC817 optocouplers for reading 24 V square-...
Alessio Lami's user avatar
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I'm using PIC16F18346 controller for relay switching. When the load is not connected relay is switching properly, no toggling or any other problem. When the load is connected, after some press relay ...
Jaimin's user avatar
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I'm designing an ESC for a quadcopter drone. For the half-bridge MOSFETs, I'm using the AGMSEMI AGM403AP, which has a maximum gate-source voltage rating of +-20V. The gate driver I plan to use is the ...
Robert's user avatar
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I can't seem to find the power return ("ground") pins for the Allwinner R11 SOC, datasheet here. According to the datasheet, there are multiple VDD pins but according to the Recommended ...
shysd's user avatar
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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 ...
Enzio Ardesch's user avatar
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3 answers
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When designing a PCB, what parameters or design considerations are used to determine the appropriate trace width for each signal or power net?
akash Pulikkal's user avatar
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I'm trying to create a hole in my board that does not pass through all layers, and I'm wondering if this is possible in Altium. Basically, I need a mechanical hole that starts at the bottom of my ...
Ayman Islam I's user avatar
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I'm having trouble with my circuit using an ADG819 for cold booting a radio module. My application is typically in the nanoampere range, so I use this for switching redundant systems when my main MCU ...
Boyfinn's user avatar
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I've been working on a coilgun/electromagnetic accelerator/Gauss cannon for the past few weeks, and I'm having serious trouble building a real physical circuit to test my coils. I'm charging the ...
Guillermo Palomo's user avatar
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I am designing a relay PCB for an application rated upto 16A. The space is a constraint for me so for better connection, I used a copper pour for the line on the top layer and neutral on the bottom ...
ASY's user avatar
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I am using kicad 9, and it is placing the test for the component type and value on the PCB. I do not want this is it clutters everything up and causes lots of DRC violations. Is there a simple way to ...
Robin's user avatar
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I'd like to build a USB-based M.2 B-key card. To be specific: I don't want to connect M.2 via USB but the other way around. As I understand it, M.2 includes USB 2.0 pins directly, but I'm not quite ...
CodeSpoof's user avatar
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I'm designing a circular PCB in Altium Designer. The components are placed at integer angles like 120, 90, and 300. Differential routing produces a very poor drawing, and I couldn't solve it with ...
Şamil Doğan's user avatar
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I placed vertical work guides: Now I can't delete them. How can I remove the guides? Altium V24.1.2
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I have recently updated Altium to v25.8.1 and noticed when selecting multiple component designators, the properties panel no longer allows me to modify the "autoposition" attribute. I ...
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I am just routing my PCB. Just wanted to check how crucial the crystal design is for an off highway application? It is a 8MHz crystal for a S32K144 NXP MCU. The GND plane you can see if stitched ...
Matt's user avatar
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I’m designing a small board with a external IMU that requires 3.3 V ±7%, nominal current of about 0.1 A, and a max start current of 1.5 A according to its datasheet. I have very limited space, so I’d ...
Knowledge's user avatar
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I have T9GS1L14-5 PCB mounted relay. I made this PCB: to put it on. The big exposed copper area has rectangle holes for wire mounting. Because of relatively high current (5+ amps) for 1oz copper, I ...
Name's user avatar
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If I use a trace width calculator to find out the width of copper I would need for a specified current. Now for my situation I need 120-150A of current (peak), 40 - 50A continously. I am using a 4 ...
Gokul Karthik's user avatar
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I am trying to breakout the pins from an FFC receptacle that connects to a 7 inch TFT LCD touch screen to header pins. This is part of a board that I'm designing which is meant to create a working ...
entersandman's user avatar
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3 answers
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This is a circuit for one of my classes on university. This is (supposedly) the final version before I turn it in, so I would like to ask for some help to see if there is something out of place or ...
dagriel's user avatar
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For LPDDR4 T Branch topology layout routing do I need to match the length of Level 1 branch also with A0 with other address group like A1 A2 etc should be also equally length match. Level 1 branch ...
Monesh Rathod's user avatar
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I would like to ask for your help directly—like spotting obvious, glaring problems that a newbie like me might make. So, my idea is a door/locker controller based on two R503 fingerprint sensors with ...
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I have never split a power plane before and I am considering splitting the power plane like this. Is this one of those I have a great idea, which turns out to be really bad moments? Info PCB size is ...
Mr.Y's user avatar
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5 votes
3 answers
490 views

If I have an application that takes 50A DC continuous, then the wire that I have to use 3 or 4 AWG wire. But on a PCB it is enough to use a 1 oz / sqft 70 mm width trace/polygon plane (KiCad trace ...
Gokul Karthik's user avatar
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4 votes
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Previously my whole middle layer was designed as ground (top and bottom for signal and one of the middle for ground, another one of the middle is not used). However, a 4-layer PCB costs 6 times more ...
james's user avatar
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This microcontroller has many options for each pin (GPIO, UART, SPI, I2C, etc.) , and I don’t know how to choose between them. Can you explain how pin selection is done in a hardware design and send ...
aleyna's user avatar
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I’m working on a redesign of a board that currently uses a 40-pin connector. My idea is to replace it with a new connector and link the two boards using a flexible flat cable (thin and bendable). My ...
Daniel's user avatar
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I am using Proteus 8.17 SP5, I want to make a copper pour around a crystal oscillator. When I turn the whole top face into a ground plane, it works fine, there is a gap between the grond plane and the ...
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I’m designing an ESC for a drone powered by a 4S LiPo battery(max 16.8 V). For the gate driver I chose the UCC27712-Q1, and for the MOSFETs I’m using the AGM403AP. According to the driver's datasheet, ...
Robert's user avatar
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I am currently learning PCB design as a hobby and recently completed my first independent PCB project. I would greatly appreciate it if a professional could review my design to identify any potential ...
Qasim Khokhar's user avatar
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I'm dipping my toes into PCB design for a project that I'm working on. Sorry if these are stupid questions. I've searched the answers for a long time and haven't found answers. Simple DC circuit ...
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