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:

• a Fritzing FZZ file containing the PCB layout

• Fritzing's schematic view (printed to PDF at 450x315mm no margins)

• an etchable PDF export from Fritzing (combined using pdfunite from poppler-utils)

• a ZIP archive of the Gerber export files for the QA board (sent to me by Fritzing Fab)

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):

back to The Man-Machine...