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- 3 commits
- 3 files changed
- 1 contributor
Commits on Apr 22, 2019
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revC1: increase mounting hole size from 3.2mm to 3.5mm, add courtyard…
… space around - 3.2mm is the standard mounting hole size for M3 screws. But this requires tight tolerances that sometimes are difficult to achieve with hobbyist tools. 3.5mm allows for more tolerance - a M3 washer has 7mm outer diameter. A 3mm screw+washer can be offset 0.5mm in a 3.5mm hole -> 8mm space necessary around the center of the hole. Add 1mm clearance + tolerance around gives a 10mm diameter courtyard keepout zone - change to a pad style with small vias in it because the vias slightly increase the adhesion of the copper to the FR4 material. I think it also looks nice.
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