An aftermarket vehicle head unit integration cartridge for use with an aftermarket head unit is provided. The aftermarket head unit preferably includes a dedicated slot for insertion of the cartridge. The cartridge preferably supports communication between a plurality of electronic components in the aftermarket head unit and a plurality of electronic components in the vehicle. The plurality of electronic components in the aftermarket head unit may include, for example, an audio processing system, a video processing system, an analog I/O and/or a digital I/O. and/or a plurality of electronic components. The plurality of electronic components in the vehicle may include an audio system, an analog I/O, a digital I/O/databus, and/or a steering wheel control unit. The cartridge may include a flashable memory for use in reconfiguring the cartridge. The cartridge may be configured to capture and condition the signals from at least one of the plurality of the vehicle-based electronic components. The conditioned signals from the vehicle-based electronic components may be conditioned for use by the aftermarket head unit.

A head unit system for controlling an object includes a head unit device that include shear thickening fluid (STF) and a chamber configured to contain the STF. The chamber further includes a set of gates between a front channel and a back channel. The set of gates includes a bypass opening set. The head unit device further includes a piston housed at least partially radially within the chamber. The set of gates is configured to control flow of the STF between the front channel and the back channel to control rotational movement of the object. An accessory module assists in control of the object.

An apparatus for mounting within a vehicle, an object having at least one receptacle in a first main surface. The apparatus comprises a base having a mounting surface. A latch and a frame are movable between latched and unlatched positions and are biased toward the latched position by a first biasing element. One or more push buttons are movable between extended and depressed positions and are biased toward the extended position by a second biasing element. A lower portion of the push button blocks and allows movement of the frame toward the latched position when the push button is in the extended and depressed position, respectively. The first main surface pushes the push button to the depressed position, thereby enabling the first biasing element to move the latch and the frame to the latched position, in which the latch engages with the at least one receptacle.