How does my attached PCB + schematic look in terms of functionality? I know it's ugly and there's two odd empty spaces (bottom-left corner, top right corner) but I couldn't figure out what to fit there, as well as that I've already spent more than 8 hours working on this simple PCB. It's my first completed one.
Some things to note about the schematic/PCB:
- For all of the resistors, diode, and fuse, they are "duplicated"; this is so that I can decide whether I want to use an SMD or through-hole component in the future
- The Op-AMP is also duplicated, with both a regular SOIC8 package (on the front) and a TDFN8 package (on the back)
- There is some solder mask that has been removed; this is so that I can add solder in the future, if I decide to go above 1A and want to decrease voltage drop
- STP* = "Small through point", BTP* = "Big through point", in case I need to make bodges or decide to make circuit changes
- The 4 yellow arrows in the board view show my 4x mounting spots
- Most traces are 0.4mm or greater (excluding the TDFN8 traces, which are 0.25mm)
Copper fill:
- Corner smoothing of fillet, 0.5mm radius
- Electrical properties of 0.5mm clearance + 0.025mm minimum width
- Thermal relief gap of 0.3mm and spoke width of 0.8mm
Further, most components + through-hole points on the PCB are spaced 1.5mm (or greater) apart.
Two problem I know of:
- The silkscreen of D1 covers the solder pad. I have 0 idea how to fix this and tried to google it but couldn't find an answer
- I seemingly arbitrarily alternated between 45-degree traces & free-angle traces (this can be fixed but I'm tired). I don't think this will create any functional problems?