Questions tagged [pcb-assembly]
The process of mounting electronic components onto a printed circuit board. This can be done manually with a soldering iron, or automatically using a "Pick and Place" machine.
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Are the diodes and capacitors oriented correctly in this motor driver PCB? TMC2209 stepper motor driver
If the polarity of both diodes and both caps look right, the driver IC probably smoked because of my solder job.
Datasheet:
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How do they make PCB with 0.2mm tracks? [duplicate]
I want to understand how do they make PCBs with 0.2mm tracks. I have built PCB using screen printing process. As screen print requires 0.5mm minimum track thickness, I need to keep track wider. ...
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2D mapping of PDB Layout in Allegro
I am trying to export a 2D drawing of my pcb layout in allegro. I would like the layout to include the components and their reference designators. However, I cannot find a way to do so and the ...
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PCB Layout review: ESP-07 with 28BYJ-48 Stepper board
I have used the 28BYJ-48 in conjunction with an ESP8266 in some applications and I thought it would be handy to have pcb made. I want to use JLCPCB including Pick and Place.
The Kicad source code is ...
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Footprint pads for an RF chip in QFN package
We are working on a design that uses the Analog Devices HMC321A. The datasheet does not specify a recommended footprint; they do specify the IC dimensions. The pins/pads on the chip have a nominal 0....
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How to solder a 5.5x2.1 DC plug to a PCB?
I am looking at mounting a DC plug on the side of my PCB board.
Unfortunately, only jacks exists for purpose of PCB mounting, and there are no mountable plugs produced.
(if they existed, they would ...
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What should be the minimum number of SMD components on a reel (minimum tape length) for a pick and place machine?
What should be the minimum number of SMD components on a reel for a pick and place machine? Different scenarios are possible for each machine. In terms of professional machines, if everyone writes ...
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PCB design - Routing without a schematic
I am using Altium CircuitMaker to design a PCB. I'm wondering if there's a way to make my PCB design without a schematic.
My idea is to simply make a PCB with just pads and populate it myself with the ...
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PCB Design Process
I'm new to PCB Design so I wanted to clarify a few things about the process.
For context, I have already physically made my project on a breadboard. Now I am trying to lay it out on a PCB.
I have ...
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How do you align parallel connectors (e.g. Raspberry Pi CM4) in production?
Apologies if this seems like a duplicate of this question but the eventual "answer" to that seemed somewhat anecdotal at best - and there's been a LOT more of these used since 2012 so things ...
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Is pad against pad enough for a good connection?
I have two PCBs that I need to connect together with holes or notched pins that I have to solder by hand.
In order to reduce soldering time, I've placed a few 2mm square pads on the bottom PCB and I'm ...
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Production quality issue?
I had 5 two-layer boards fabricated by a popular assembly house in China and I'm curious what folks thoughts are based on what I received.
Here is a photo of the 5 boards which has a red square around ...
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Diode and bipolar NPN transistors orientation not correct, says JLCPCB
JLCPCB is telling me 4 components are incorrect but when I look over it and the datasheet it all seems correct to me.
My original | JLCPCB corrected:
This is what my current board looks like:
My ...
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Supplier advising age of 74HC173 SOIC parts
I put in an order for 50 Nexperia 74HC173D,652 with JLCPCB for some kits I'm having built and assembled by them. These are going into electronics kits that are sold to high schoolers as part of a ...
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Is this USB C connector with tight pads too risky to use?
I'm intending to use the following vertical USB C connector because the long board overhang fits requirements, but the footprint causes some concern, not least because it seems to violate JLCPCB ...
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