Schematics don’t do you much good on today’s high-tech electronics. Most high-tech electronics nowadays use custom chips or FPGAs so a schematic that shows all the signals going in and out of a magic proprietary chip won’t do you any good.
A lot of lower-tech components that perhaps use discrete parts, relays, discrete resistors, etc. do have schematics on the inside of the case or available online.
Read More: PCB Design
#PCB Design
I am designing a 2 layer PCB with components on both side of it. SMT components are one one side of PCB, but TH (through hole) components are on both sides. I need to understanding something mentioned by the supplier called primary and secondary sides.
I am prototyping a PCB, using Chip Quik’s “SMDSWLF.031, a Sn96.5/ Ag3.0/ Cu0.5 solder with 2.2% no-clean flux. I find that the black spots appears frequently in larger pads on my board. I wonder if it is because I left the soldering iron more time heating the solder and that burnt the flux. What is that black residue? Is that a sign of a bad joint or maybe bad soldering technique?
We receive a batch of PCB with scratches from my supplier, but they think it is acceptable. I have never seen such error on even an B stock boards parts. Very confused. How do scratches affect PCB working?
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