Questions tagged [manufacturing]
The manufacturing tag has no usage guidance.
243
questions
0
votes
1
answer
155
views
Manufacturable technology for force-sensitive button
I'm hoping to hear your perspectives on which force-sensing technologies would be most reliably and inexpensively manufactured at volume. The application is a pressure-sensitive button, as are found ...
- 11
11
votes
7
answers
2k
views
Do manufacturers try make their components as close to ideal ones as possible?
I was wondering what developments are done on electrical components today.
Do manufacturers try to make the electrical components they sell as close to the ideal model as possible? So for example, is ...
- 125
0
votes
0
answers
120
views
How to prevent solder getting into through hole during HASL process?
I think this is an easy enough question - I just don't know how to effectively search for the answer.
I have a PCB that came back and the programming header is plugged with solder. This most likely ...
- 12k
3
votes
1
answer
61
views
SMD Stencil Material Choice
We are planning to purchase a stencil for our LED boards. This will be my first stencil purchase so I don't have much idea about a good or bad one.
The inquiries I received typically suggest two ...
- 942
1
vote
4
answers
4k
views
Soldering one PCB to another with 90 degrees angle
I want two PCB's to be soldered with each other in 90-degrees style.
I think that the base PCB should have a slot with the width equals to the top board thickness. The top board should have a flange ...
- 3,012
0
votes
0
answers
79
views
Why wierd capacitance values [duplicate]
Why are capacitors available with values like 378 µfarad and 0.22 farad which have prime numbers like 11 and 7 in factorization instead of values like 375 µfarad and 0.2 and 0.25 farad ...
- 261
2
votes
1
answer
263
views
Problems with doping semiconductor materials in 7nm technology
As you know, semiconductor technology is going to reach 7nm lithographic precision soon. Which means that the smallest segment length on a semiconductor die can be as short as 7nm. After making some ...
- 14.2k
24
votes
6
answers
5k
views
Writable area on a PCB
I would like to create an area on my PCB where you can write on with a pen.
Is this possible, and if so how should I do it?
- 393
10
votes
1
answer
1k
views
'Pick and place' feature in connectors
I am looking to source a four-pin, 1.0 mm pitch, vertical JST connector -- either BM04B-SRSS-TB(LF)(SN) or BM04B-SRSS-TBT(LF)(SN). The latter has an extra 'Pick and Place' feature in Digikey. I can'...
- 2,516
1
vote
2
answers
696
views
Reed Switch Failure Modes
I've been playing with these through hole reed switches: MDSR-4-12-23. It has been my experience so far that you have to be very careful in handling them, including when bending the leads to 90 degree ...
- 22.8k
4
votes
1
answer
272
views
Designing for Low Cost China Manufacturing [closed]
I have designed a few boards on a consulting basis. Some of them have been manufactured in China in +10k unit volumes. One of the complains I have gotten from my clients is my boards can be a bit ...
- 3,536
8
votes
3
answers
4k
views
What is this small unconnected solder blob on this PCB?
There's a small solder blob in the middle of this one-sided PCB (a switch-mode power supply), surrounded by unmasked board. The blob is 1.5mm in diameter, and the non-masked area is 4mm in diameter. ...
- 486
5
votes
2
answers
2k
views
Usefull 0402 and 0603 solderbridge footprints compatible with machine manufacturing?
I am currently in process of my eagle library cleanup, and came up with the idea to create a footprint similar to the one from nucleo boards. Those pads are meant to be easily bridged by just solder ...
- 81
2
votes
2
answers
1k
views
Do any commercial products use dead bug construction? [closed]
I'm talking about connecting electronic components without using a PCB. Soldering such an assembly is pretty fast if you have a jig holding the components in place.
(The examples below are laid out ...
- 298
0
votes
3
answers
142
views
Makeshift SMT Station. Any suggestions? [closed]
I am trying to do some surface mount soldering for my project and have hit a few snags.
My hot air gun works perfectly fine for most of the PCBs I am making but one type in particular is problematic....
- 152
8
votes
1
answer
733
views
Do Soft Termination Caps Really Increase Reliability?
I'm managing several designs. At one point I identified a few failures that were caused by 0603 caps failing short. After that I switched to all soft-term caps to hopefully eliminate the problem.
...
- 7,119
5
votes
2
answers
667
views
How to deal with unused components in pick-and-place file?
I intend to send a board to a PCB manufacturer and I am wondering how to mark unused components in the pick and place file. I'm using EAGLE and I saw that it includes all components in the file, but I ...
- 347
-1
votes
1
answer
1k
views
In Altium Why My Square slot is shown round in Gerber?
In Altium I have created a square slot in PCB then I create the gerber files.
In CAM, file's square slot is shown as round shape.
Can anyone explain why?
Also I have enabled the G85 command.
- 69
3
votes
1
answer
441
views
Manufacturing of Translucent LED Indicating Symbols (e.g. router indicator lights) [closed]
I've been researching how manufacturers create custom LED-illuminated symbols such as those seen on the router in the image below:
I haven't been able to find any information online from custom ...
- 39
14
votes
3
answers
421
views
LEDs no longer bang - or whimper!
I volunteer at a club to teach Arduino programming to teens. As part of that, of course, I talk about voltage, current and what not to do. My prime example is taking an LED, putting it directly across ...
- 1,493
3
votes
1
answer
907
views
logic level conversions for opto-isolators in digital input acquisition
This isn't my usual job, I'm not an EE, but I want to give it shot...
This question concerns developing an interface board to connect a device (DUT) to a test system in a manufacturing scenario.
...
- 33
0
votes
0
answers
559
views
Fast but affordable way to crimp dupont connectors
I'm currently doing a small production run of a board I designed. It features a few pin header type dupont connectors which are used to attach cables to the board.
Now, I can surely crimp this using ...
- 868
2
votes
1
answer
1k
views
How are glass diodes produced?
What I am trying to understand is how the diode is placed inside of the encapsulating glass container such as that pictured in the following:
I've tried to read some patents, where I more or less ...
- 601
-2
votes
1
answer
123
views
Still 1000 hours of lifetime [closed]
I am familiar with the famous Phoebus cartel of the companies Osram, Philips and GE, but this cartel began its operation in 1924 and lasted at most to the World War II. In the second half of the 20th ...
- 21
1
vote
1
answer
402
views
Does Apple or Qualcomm do product binning for their SoCs?
It's well known that Intel does product binning with their CPUs — essentially selling the same chip as multiple different chips with different specs and prices based on the tested properties of the ...
- 171
9
votes
4
answers
3k
views
Why are accelerometers (and other MEMS devices) so rarely integrated into components?
With the way things are headed, more and more functionality moves into a single chip each year. However, one thing that seems to remain completely untouched by this is MEMS devices like accelerometers ...
- 346
0
votes
1
answer
78
views
Any script for detecting PCB size or the trace width/spacing
everytime I place an order on PCB manufacturers (such as PCBWay), I need to fill out the related parameters of my boards - the width, the length, the trace , holes and etc. Has anyone tried to work ...
- 1
3
votes
1
answer
29k
views
JL (or maybe something else) misterious branded IC's, what is the origin? [closed]
Edit 12/31/2019: Thanks to Mariano Dupont:
Found it: Zhuhai Jieli Technology zh-jieli.com
Take a look at this example of an IC found on a circuit board:
Brand is found on many PCB's of Chinese/...
- 1,367
2
votes
2
answers
195
views
Will PCB assemblers solder wires to the board?
When preparing a medium run prototype, are there any manufacturers out there who will solder wires to you if you ask? For example, I have a device with 6 sensor pins. I'm hoping that a manufacturer, ...
- 493
0
votes
1
answer
199
views
CE certification
One of the required CE test technical files is "Test Reports". This document has to be provided to the test agency.
Does anyone know what data should be included in this document?
Here are the ...
- 139