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This two-layer 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 an order has been placed to [[http://fab.fritzing.org/|Fritzing Fab]] for a prototype to QA. 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)]]

This two-layer development board was laid out using Fritzing, and an order has been placed to Fritzing Fab for a prototype to QA. 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

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):


back to The Man-Machine...

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

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