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Revision 13 as of 2012-06-17 19:50:59
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Revision 17 as of 2012-06-17 20:01:55
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This printed circuit development board was laid out using [[http://fritzing.org/|Fritzing]], and an order has been placed to [[http://fab.fritzing.org/|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:
 * [[attachment:SpiffChorder.fzz|Fritzing file]]
This two-layer development board was laid out using [[http://fritzing.org/|Fritzing]], and a prototype has been submitted to [[http://fab.fritzing.org/|Fritzing Fab]]. The fabrication cost for one unit, including international shipping to the USA, was roughly US$40. I'll post pictures once it arrives in a couple weeks and I have a chance to run tests, but here are some preliminary details:

* [[attachment:SpiffChorder.fzz|a Fritzing FZZ file containing the PCB layout]]
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 * [[attachment:SpiffChorderEtchable.pdf|etchable PDF export (combined using pdfunite from poppler-utils)]]
 * [[attachment:SpiffChorderGerber.zip|compressed ZIP archive of Gerber files]]
 * [[attachment:SpiffChorderEtchable.pdf|an etchable PDF export from Fritzing (combined using pdfunite from poppler-utils)]]
 * [[attachment:SpiffChorderGerber.zip|a ZIP archive of the Gerber export files for the QA board (sent to me by Fritzing Fab)]]
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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: So far I'm using the same BoM from [[ManMachine/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.jpg|{{attachment:SpiffChorderPaperTestThumb.jpg||SpiffChorder Paper Test}}]] [[attachment:SpiffChorderPaperTest.jpg|{{attachment:SpiffChorderPaperTestThumb.jpg|attachment:SpiffChorderPaperTest.jpg}}]]
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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): The 0.1" pitch right-angle screw terminal blocks I used are just slightly longer than 0.4" each. So as to be able to fit the four for CON3-4 directly adjacent to one another, I lightly sanded the facing sides until they fit snugly but evenly in a piece of perfboard. In an effort to make it easier to solder these evenly on the board, I attached their sides together 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.jpg||SpiffChorder Screw Terminal Sanding}}
{{attachment:SpiffChorderScrewTerminalsGlued.jpg||SpiffChorder Screw Terminals Glued}}
{{attachment:SpiffChorderScrewTerminalSanding.jpg}} {{attachment:SpiffChorderScrewTerminalsGlued.jpg}}
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[[../|back to The Man-Machine...]] [[ManMachine|back to The Man-Machine...]]

This two-layer development board was laid out using Fritzing, and a prototype has been submitted to Fritzing Fab. The fabrication cost for one unit, including international shipping to the USA, was roughly US$40. I'll post pictures once it arrives in a couple weeks and I have a chance to run tests, but here are some preliminary details:

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:

attachment:SpiffChorderPaperTest.jpg

The 0.1" pitch right-angle screw terminal blocks I used are just slightly longer than 0.4" each. So as to be able to fit the four for CON3-4 directly adjacent to one another, I lightly sanded the facing sides until they fit snugly but evenly in a piece of perfboard. In an effort to make it easier to solder these evenly on the board, I attached their sides together with a tiny dab of quick-setting adhesive gel (being careful not to get it into the terminals themselves):


back to The Man-Machine...

CCL: ManMachine/KeyerPCB (last edited 2012-07-02 21:40:29 by fungi)

CC0 To the extent possible under law, the creator of this work has waived all copyright and related or neighboring rights to it.