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| So far I'm using the same BoM from [[../KeyerPerfboard|the perfboard design]]. Here's a paper test using a 1:1 scale printout of the silkscreen and solder mask together: | So far I'm using the same BoM from [[../KeyerPerfboard|the perfboard design]], but I'll probably switch up CON1 with Digikey part 609-2845-ND (vertical rather than right-angle) so as not to block the lower-left mounting hole. Here's a paper test using a 1:1 scale printout of the silkscreen and solder mask together: |
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| [[attachment:SpiffChorderPaperTest.png|{{attachment:SpiffChorderPaperTestThumb.png||SpiffChorder Paper Test}}]] | [[attachment:SpiffChorderPaperTest.jpg|{{attachment:SpiffChorderPaperTestThumb.jpg||SpiffChorder Paper Test}}]] |
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| I'll probably switch up CON1 with Digikey part 609-2845-ND (vertical rather than right-angle) so as not to block the lower-left mounting hole. Also, the 0.1" pitch right-angle screw terminal blocks I used are just slightly longer than 0.4", so I lightly sanded down the facing sides until they fit snugly but evenly in a piece of perfboard and then attached them to one another with a tiny dab of quick-setting adhesive gel (being careful not to get it into the terminals themselves): | Also, the 0.1" pitch right-angle screw terminal blocks I used are just slightly longer than 0.4", so I lightly sanded down the facing sides for CON3-4 until they fit snugly but evenly in a piece of perfboard and then attached them to one another with a tiny dab of quick-setting adhesive gel (being careful not to get it into the terminals themselves): |
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| [[attachment:SpiffChorderScrewTerminalSanding.png|{{attachment:SpiffChorderScrewTerminalSandingThumb.png||SpiffChorder Screw Terminal Sanding}}]] | {{attachment:SpiffChorderScrewTerminalSanding.jpg||SpiffChorder Screw Terminal Sanding}} {{attachment:SpiffChorderScrewTerminalsGlued.jpg||SpiffChorder Screw Terminals Glued}} |
This printed circuit development board was laid out using Fritzing, and an order has been placed to Fritzing Fab for a prototype to QA. I'll post pictures once it arrives in a couple weeks, but here are some tidbits to tantalize:
Fritzing's schematic view (printed to PDF at 450x315mm no margins)
etchable PDF export (combined using pdfunite from poppler-utils)
So far I'm using the same BoM from the perfboard design, but I'll probably switch up CON1 with Digikey part 609-2845-ND (vertical rather than right-angle) so as not to block the lower-left mounting hole. Here's a paper test using a 1:1 scale printout of the silkscreen and solder mask together:
Also, the 0.1" pitch right-angle screw terminal blocks I used are just slightly longer than 0.4", so I lightly sanded down the facing sides for CON3-4 until they fit snugly but evenly in a piece of perfboard and then attached them to one another with a tiny dab of quick-setting adhesive gel (being careful not to get it into the terminals themselves):
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