Sophie is a very straightforward design: it is simply an integrated AC-to-5V-DC power supply tailored to fit the Bud Industries PPB-11861 enclosure, with an on-board 3.3V LDO to provide a clean supply rail. Other imp-enabled devices, such as Sana, are designed to fit inside the enclosure above Sophie, connected by board-to-board spacers or headers. Sophie also includes the opto components (bicolor LED and phototransistor for BlinkUp) for the partner board.