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5 votes
3 answers
2k views

Question on "Parts should be used within 5 days after opening." statement on component shipping package

I've been given the task of verifying a batch of ICs from a chinese broker, to see that the chips the company has bought are what the broker claims they are. The package we've received looks like this,...
Lars Petersson's user avatar
1 vote
1 answer
75 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 ...
NoobPointerException's user avatar
4 votes
2 answers
1k views

Placing through hole and SMT on the same side

I have a design with huge push buttons (with 6 TH holes.) There's a few of them so they do take up quite a bit of space mechanically from the top. I was thinking of placing the majority of the SMT ...
Hasman404's user avatar
  • 757
0 votes
0 answers
279 views

How long can the leads protrude for a typical selective solder machine?

I have an LCD who's leads extend about 10mm past the board surface. Can a typical selective solder machine fountain reach this high? If not, any suggestions on the best way to handle long ...
bigjosh's user avatar
  • 10.2k
9 votes
3 answers
2k views

Anyone know the premise of this PCB assembly note?

The assembly note states: Bake bare PCBs in a clean and well ventilated oven prior to assembly at 125*C for 24 hours. Why is this necessary?
klamb's user avatar
  • 312