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.
502
questions
0
votes
0
answers
57
views
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 ...
- 11
0
votes
1
answer
152
views
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 ...
- 85k
0
votes
1
answer
92
views
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 ...
- 734
5
votes
4
answers
2k
views
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 ...
- 7,647
0
votes
2
answers
113
views
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 ...
- 7,600
2
votes
1
answer
136
views
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 ...
- 2,806
1
vote
1
answer
76
views
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 ...
- 22.5k
1
vote
1
answer
76
views
Functional discrepancy within PCBA batch
When manufacturing a small prototype batch of an embedded system at EMS I have detected different behavior between the units. All units work as expected, except that some units fail to operate same ...
- 91
1
vote
2
answers
98
views
Identical component on both sides of PCB with vias in ground pad
I have a dual analog output PCBA that I am routing. The analog output component selected is two TI DAC7750IRHAR DACs.
These DACs are controlled via SPI lines. I had originally intended to place both ...
- 91
1
vote
2
answers
98
views
What files do you need for PCBA?
Just a quick one.
It seems that for PCB manufacture, the industry-standard way to specify what you want is so-called “Gerber files”.
If you want PCB assembly as well (i.e., loading components onto the ...
- 72.6k
5
votes
2
answers
2k
views
PCB assembly cost per-board
I know this question might get closed because of being opinion depended but I couldn't find any answer from google or any other search, so I decided to ask it here.
For clarity of question I want to ...
- 17.9k
11
votes
2
answers
927
views
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 ...
- 72.6k
4
votes
3
answers
693
views
Importance of copper balance when dealing with small components (0402, 0201)
I usually work with big components (0805, 0603.) Now I'm trying to make a board that would use much smaller packages such as 0402 and 0201.
I know that balancing copper is relatively important to ...
- 2,370
1
vote
0
answers
149
views
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 ...
- 113
0
votes
2
answers
95
views
Why are some components missing areas of pour near mounting holes?
Circled in red are component through holes in a copper pour plane that are missing areas / don't have the copper poured completely around the via. Seen on tons of components both through hole and ...
- 3,446