A controller for cantilever-based instruments, including atomic force microscopes, molecular force probe instruments, high-resolution profilometers and chemical or biological sensing probes. The bead supply wheel includes a bead supply bowl and a plurality of radially and outwardly extending bead passageways connected to rotate with the bowl and dimensioned to receive a single line of beads from the bowl. Each of the housings has a bottom wall, a top wall, a back wall and a pair of side walls. The bedside sleeper is secured to the parents’ bed with safety straps. A sleeve slidably, reciprocably receives the card and assists with aligning the characters of the master password and the characters of the encrypted character strings, which are visible through a window in the sleeve. The cover layer includes a photosensitive thermosetting resin in which translucent filler is contained.