What are these dark spots around my PCB trace, and should I worry about them? I tried to remove them with 99% IPA and a brush, but they won't come off. :
What are these red dots on this PCB? : r/AskElectronics
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5pcs Dot Matrix Lcd Module Display Monitor White Backlight Adapter Pcb 84*48 84x48 5110 Screen For Arduino Controller 3.3v - Lcd Modules - AliExpress
The Causes and Solutions of White Spots in Circuit Board SMT Chip
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Hot Sale Small Size 360degree Beam Angle Dots-Free & Uniform Light Silicon Profile for 10mm PCB Strip - China LED Neon Profile and Bendable PMMA LED Profile
What are the equally spaced tiny dots on the PCB called? And what's their purpose? They have the same round size as a normal via, but they are evenly spaced everywhere. :
What is the purpose of polygon arrays on PCB (PCB design, polygon, and electronics)? - Quora
rf - What is the purpose of holes on edge of the PCB? - Electrical Engineering Stack Exchange
