GPS Clock Built

Just a quick post… gps_clock_2_8900Yesterday I wrapped up the schematic and printed circuit board (PCB) design for the GPS clock, and built it. One software change was needed — in the course of laying out the pushbuttons, it worked better use to them in a different order (e.g., up was formerly button 1, it became #4). Thankfully that soft of change is trivially easy to make in software. Of course I built the board with a 6-pin AVR programming header to enable software changes.

This was my best experience yet with toner transfer — I cleaned the copper really well first, then lightly etched with white vinegar, scrubbed with 0000 steel wool, gps_clock_2_toner_transfer_8899and finally wiped with acetone. Just like in painting, surface preparation is apparently where success is determined.

I like the clock with its guts showing, though maybe I’ll use an enclosure on the next one.

Leave a Reply

Your email address will not be published.

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>