Archive for June 13th, 2017
Proto Board Holder: Revised Screw Mounts
Posted by Ed in Electronics Workbench, Machine Shop, Software on 2017-06-13
Improving the crystal tester’s (nonexistent) grounding requires a band of copper tape around the inside of the proto board holder. Rather than cut the tape lengthwise to fit the holder, a new one will be just tall enough:
Proto Board – 80×120 – revised inserts – Slic3r
While I was at it, I deleted the washer recesses, because those didn’t work out well, and fiddled the screw holes to put the inserts in from the bottom:
Proto Board – 80×120 – revised inserts – detail – Slic3r
Although the overhang inside the holes will be ugly, I’ll epoxy the inserts flush with the bottom and nobody will ever know.
The copper tape now makes a tidy ground strap:
Crystal Tester – ground strap – rear
With a gap in the front to eliminate the obvious loop:
Crystal Tester – ground strap – front gap
The OpenSCAD source code as a GitHub Gist:
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