The SQ-3P is a MIDI step sequencer inspired by the sequencers in the Roland JX-3P and SH-101. I use the Arduino platform for it. The first breadboard prototype looked like this:

after that I designed a pcb and ordered first test run of five pcbs. After populating them the thing looks like this:

I also wrote a first draft of an owners manual. You may ignore the text which has been crossed out. also it does not yet contain the second and third potentiometer (they will be for velocity and gate length) and the sockets (start, stop, clock, velocity, gate lentgh)