All Questions
Tagged with pcb-assembly soldering
73
questions
0
votes
4
answers
1k
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What is the optimal way of clearing solder from surface-mount PCB pads for rework?
Say I have an assembled PCB with a QFP package on it. This device gets damaged and I need to replace it. Getting the device off is straightforward, but now all the pads have solder blobs on them. Is ...
- 17.6k
6
votes
2
answers
1k
views
What stages do PCB mass-assembly techniques come in?
There's a spectrum of how you get PCBs assembled.
1) Have a human pick out all the parts, solder them all on by hand, and check them all by eye. Low cost of entry. Good for low-volume high-mix work. ...
- 17.6k
7
votes
5
answers
45k
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How do I solder this USB Connector?
I bought this micro usb part:
I need to solder it to a PCB that I designed, but I'm having a ton of trouble figuring out how to do so because the tabs are very close together and hard to reach. Is ...
- 173
7
votes
3
answers
4k
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Eagle configure autorouter to solder components (except vias) only on bottom layer of double sided PCB
In double sided PCBs it is difficult to solder through hole components like IC bases, headers, etc. in the top layer. Normally the Eagle autorouter places the solder pads on both sides. That is, in a ...
- 171
26
votes
5
answers
10k
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How do I solder headers so that they always stand straight up?
When soldering headers, usually single and double pins, I flip the board over so the pin rests on the surface and then solder them. They never come out straight. It would be great if someone has ...
- 2,496
2
votes
5
answers
2k
views
How do I dead bug solder this SOT-23 to my PCB?
I swapped the base and emitter of my NPN transistor land pattern. If I flip over the part, the pins are in the correct orientation, although there is a 1mm between the pins and the pads. When I tried ...
- 2,496
9
votes
1
answer
1k
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Soldering 0.5mm pitch ICs using stencil and reflow oven
I'm new to SMD soldering, and tried to assemble a couple of boards, using a reflow oven.
I 'm using a stencil (Kapton - mylar) and so far it worked fine except for the LQFP48 devices (pitch 0.5mm). In ...
- 191
8
votes
3
answers
1k
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Fast approaches for Soldering / PCB assembly
Our team (three hobbyists now developing our first serious device) is interested in soldering/assembling approximately 200 PCBs. We've already found a low-cost manufacturer for the raw boards, so just ...
- 1,699
14
votes
4
answers
10k
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Questions on mass-production soldering
Wave soldering
I am trying to understand how wave soldering works. Unfortunately the Wikipedia article has has left me unsure about the process:
Is the entire board with its components quasi-...
- 5,219
9
votes
5
answers
6k
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Which is easier to solder: TSSOP or QFN?
Which package easier to solder on home-brew PCBs:
TSSOP
QFN
I generally use solder paste and hot-air / hot-plate.
- 5,219
3
votes
2
answers
393
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Is this part hand-solderable, or will certainly require reflow soldering?
Here are the mech specs for the part (it is a GSM module) -
Note that all dimension are in "mm".
If hand-solderable do I need to keep some specific precautions in mind (from soldering standpoint). ...
- 3,534
12
votes
3
answers
6k
views
Soldering heatsink pad on bottom of IC
I am attempting to make a board for the tlc5951 24-channel led driver to drive an 8x8 rgb led array. I have made what I think is a good eagle library for the sop-38 package, but I am not sure what to ...
- 2,054
21
votes
9
answers
5k
views
Sizing SMD components for Hobbyist Kits
More components are only available in SMD packages.
For hobbyist assembly the options are to buy breakout boards or
solder SMD.
Since components are usually packaged in a couple of SMD
package ...
- 11.8k