A device including a crossbar array including a programmable material layer and an array of op-amps connected to outputs of the crossbar array. A controller, remote from the arm, senses the barrier position to identify limits of barrier travel and to control rate of travel of the barrier between limits. The invention also provides a method of simultaneously infiltrating and brazing injection molding components of similar or dissimilar materials together. This protection cylindrical part is fitted to the outer periphery of the first cylindrical part.