Fig. 3

12 × 16 BlindPAD display (right) consisting of array of 12 × 16 latching electromagnetic actuators and a 3D printed pin interface, the control board (center) and a Raspberry Pi single-board computer (left). The control board is generally mounted under the display, as in Fig. 1. All 192 pins can be reconfigured in less than 2 s. Distance between pins is 8 mm and stroke is 0.8 mm