Here are a few pictures of the new board. First, bare copper, top and bottom:
http://downloads.qi-hardware.com/people/werner/anelok/tmp/ybox2-0-pcb-cu-top.jpg http://downloads.qi-hardware.com/people/werner/anelok/tmp/ybox2-0-pcb-cu-bot.jpg As one can see the registration is not perfect and the drill for some reason didn't penetrate everywhere (it should overshoot by nominally 0.5 mm) but things still looked within manageable tolerances. After tinning and adding the most important vias: http://downloads.qi-hardware.com/people/werner/anelok/tmp/ybox2-0-pcb-tin-top.jpg http://downloads.qi-hardware.com/people/werner/anelok/tmp/ybox2-0-pcb-tin-bot.jpg The big hole in one of the QFN footprints is to connect the chip's (the CC2543) center pad to ground. Interestingly, the chip has no other ground input. Next, with all the components except the transient voltage suppressors (expensive and I don't really need them at home): http://downloads.qi-hardware.com/people/werner/anelok/tmp/ybox2-0-pcba-top.jpg http://downloads.qi-hardware.com/people/werner/anelok/tmp/ybox2-0-pcba-bot.jpg Note that I switched from KL25 to the new KL26. Let's hope the FRDM-KL25Z won't mind programming that one, too. The board wasn't too hard to solder. I should probably move R3 (series resistor for the RF LED) to the bottom, to disentangle that corner a bit. The board in all its glory: http://downloads.qi-hardware.com/people/werner/anelok/tmp/ybox2-0-view.jpg And here is a thickness comparison with the old one. As one can see, the new one extend only a few mm above the PCB and barely one below. So the case should be a lot leaner: http://downloads.qi-hardware.com/people/werner/anelok/tmp/ybox2-0-compare.jpg Haven't tried to power or even program it yet. - Werner _______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
