# Not quite a PCB review, some wisdom requested

**URL:** <https://lookmumnocomputer.discourse.group/t/not-quite-a-pcb-review-some-wisdom-requested/4893>\
**Category:** DIY STUFF\
**Created:** [April 15, 2022, 5:57pm UTC](https://lookmumnocomputer.discourse.group/t/not-quite-a-pcb-review-some-wisdom-requested/4893 "2022-04-15T17:57:43Z")\
**Posts on this page:** 1\
**Showing post:** 19

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**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\
**Post date:** [April 20, 2022, 11:24am UTC](https://lookmumnocomputer.discourse.group/t/not-quite-a-pcb-review-some-wisdom-requested/4893/19 "2022-04-20T11:24:18Z")

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> [@hitachii](#):
>
> Are there any last minute checks to make aside from a final careful look with my own eyes?

Raise your hand, all those who’ve forgotten to do these things:

- Run ERC on the schematic and DRC on the board 🙋
- Check to make sure no op amps have reversed inputs (if there’s a feedback path from output to + input, it’s probably wrong) 🙋
- Check power connections to chips for reversal 🙋
- Check orientations of polarized caps and diodes 🙋
- Check capacitor footprints for lead spacings and body sizes 🙋
- Check pots to make sure they’re not connected backwards (usually pin 1 to the lower voltage if a voltage divider; usually pin 2 connected to pin 3 if a variable resistor. Usually. And those are if using footprint where pin 1 is counterclockwise, which is not true of some footprints, so check that too.) 🙋
- Check pin headers and sockets to make sure connections are consistent on both sides 🙋
- Do track cleanup (KiCad PCB tools menu) 🙋
- Make sure silkscreen isn’t garbled with e.g. references/values on top of each other, off the edge of the board, on top of a pad, etc. 🙋
- Check connections and orientation of board mounted toggle switches 🙋
- Check if adequate information shown on the silkscreen. Maybe your name, credit to circuit designer, license information, GitHub URL… 🙋
- Is there anything confusing about the build that could be mitigated with some notes added to the silkscreen? 🙋
- Check mechanical matching between sandwiched boards, board and panel, etc. — do mounting screw holes line up? Headers/sockets? Board mounted components and panel holes? 🙋
- Check for adequate clearance on all four sides of PCBs, allowing gaps between adjacent modules and allowing enough space at top/bottom to mount the module 🙋
- Verify everything routed 🙋
- Verify all fills updated and filled 🙋
- Order number location marker on silkscreen, if appropriate 🙋
- Look at the Gerbers in a Gerber viewer to verify they look right 🙋

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