Over the summer I designed a custom printed circuit board for a class I co-teach, in which students design and build a programmable lamp. I just got around to documenting the board. In the scope of PCBs, this is not a complex one but it's always nerve-racking to design and mass-produce a circuit board that many projects will depend on. One incorrect connection can void everything. So far the project has been a success! I call it "Sleepyboard Mini." http://www.extrasleepy.com/#/sleepyboardmini/

Sleepyboard mini is a custom PCB designed specifically to fit an Arduino pro mini, Adafruit USB micro-B breakout, an on/off switch and a few capacitors. There’s a small perforated breakaway prototyping area at the bottom of the board and a location for a single pushbutton at the top. All holes are connected horizontally in sets of 4 or 5, similar to a breadboard.