All Questions
Tagged with pcb-assembly soldering
73
questions
1
vote
0
answers
189
views
Do I need to alter my reflow profile for a PCB with thicker copper?
I have always been working with pretty standard 1 oz. copper PCBs and using a Controleo3 reflow oven with great success. However I am now working on boards that will potentially have 3oz or 4oz copper ...
- 1,197
0
votes
2
answers
317
views
What happens if I don't tin my DIY self-etched PCB traces?
Once I etch my PCB from copper-clad FR4, do I need to tin the board with solder?
If I do not tin the traces, what are the possible issues besides greening over time?
- 2,170
1
vote
1
answer
325
views
Via on pad for bga decoupling. Is this ok when hand soldering?
I have understood that via on pad is bad for automatic assembly processes, but can be fine for hand soldering, since it is easy to compensate for the solder that wicks into the via.
I am doing a small ...
- 13
5
votes
1
answer
1k
views
What is "activity" in solder flux?
I'm trying to select a solder flux and so many references (and one or two SE questions) discuss the types and differences. They mention "activity", such as "Rosin Activated (RA) flux ...
- 475
1
vote
0
answers
53
views
Can I expect a solderpaste circle to reliably reflow onto a smaller circlular pad?
For various reasons, I need to pad a bit more solder paste onto a fixed-size pad, and I cannot change the stencil thickness without messing up other footprints.
The pad is a 1.2mm diameter circle, and ...
- 327
9
votes
4
answers
3k
views
Soldering a thin spring steel wire to a PCB
Pretty noobish at electronics here. That said...
I want to attach a very thin 1080 spring steel/music wire (30 AWG or ~0.25mm) to a pcb with a thru hole, hopefully in an automated way. The choice of ...
- 103
0
votes
1
answer
78
views
Keyboard switch removal problems
I recently put together a keyboard and had an issue with a couple switches so I decided to re-solder. I resoldered 2 and that fixed the issues but for this last one I started smelling something ...
0
votes
1
answer
509
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How to make an electrical connection to thin gold plating?
Hello fellow engineers.
I am trying to make an electrical connection with some gold plating. The gold plating is shaped like a rectangle, with dimensions of 3mm x 1.5mm x 0.1μm thick. Here is what ...
11
votes
7
answers
5k
views
Hand soldering SMD 1206 components [closed]
Because I tried to wire-solder a protoboard which failed miserable, I'm intending to order a PCB. However, to minimize the area, I want to use some SMD1206 components. I ordered some basic ones (...
- 14k
17
votes
9
answers
7k
views
How to remove this component from PCB
Anyone have any idea how I could remove this component?
I've tried blowing hot air, used solder wick, tried to poke the holes with two soldering irons, cut the pins to near the PCB, but it won't ...
- 403
6
votes
8
answers
3k
views
How can I add "standoffs" to elevate a SMD component above the PCB?
I made a mistake when creating a symbol/footprint for a small (2.0 x 1.6 mm) SMD crystal and didn't notice until the prototypes didn't work. Unfortunately, the boards are tiny and expensive (0.4 mm ...
- 17k
1
vote
0
answers
43
views
Using board-to-board pins and crimp receptacles to attach a non-board receptacle to a board
I imagine this is a bit of a stretch, but I'm working through some iterations of a cable harness for a 3D printer. I've considered that a custom PCB may be in order (still on the fence there), but the ...
- 144
7
votes
1
answer
1k
views
How to remove kapton tape from soldered parts in bulk?
I have PCBs with SMT nuts (SMTSO2060MTJ) which has been assembled onto a PCB - the nut has kapton tape on top to allow easy pickup for assembly.
However, removing the kapton post reflow is proving ...
- 462
10
votes
2
answers
3k
views
Double-sided Assembly
I'm going to assemble a prototype PCB which have components on both sides. I have access to a reflow oven with profiling control, solder paste and stencils (from OSH-Park)
In the reflow process for ...
- 934
0
votes
0
answers
446
views
Are there blank prototype PCBs with staggered edges for a DB25 connector?
Are there blank prototype PCB boards I can buy that will accept a solderable DB25 with its staggered pins?
- 2,885