On Tue, May 12, 2015 at 1:41 AM, Eric Smith <spacewar at gmail.com> wrote: I had a PCB made of basically the same circuit, with a TLC7705 voltage supervisor/reset circuit added, and a stuff option for an actual RS-232 port. I've added photos to the album linked above. Unlike the solderless breadboard version, it did not work the first time, and I haven't yet figured out what's wrong with it. The reset circuit seems to work correctly. I should have added a bus connector for I/O expansion. I was in a hurry and it had to be under 100mm square to get the boards made inexpensively. Rather than soldering in the exceedingly rare 3M QUIP socket, I soldered down four 16-position single in line machined-pin sockets, and plugged the QUIP socket into those.