Abstract: A system configured to monitor and characterize motions of a user is disclosed herein. The system can include a wearable article including a tubular body comprising a resilient material, a flexible circuit including a fluid-phase conductor configured to generate a first signal, and an inertial measurement unit (“IMU”) coupled to the resilient material, wherein the IMU is configured to generate a second signal. The system can further include a processor communicably coupled to the flexible circuit and the IMU.

Abstract: Devices, systems, and methods for making and using highly sustainable circuit assemblies are disclosed herein. In various aspects, the highly sustainable circuit assembly includes a substrate layer; and a pattern of contact points supported by the substrate layer. The pattern of contact points can be configured to correspond to at least one terminal of an electrical component. The pattern of contact points can include a deformable conductive material. The deformable conductive material can be a non-hazardous, readily reclaimable, readily recyclable material.

Abstract: Devices, systems, and methods for making and using circuit assemblies having a pattern of deformable conductive material formed therein are disclosed herein. In various aspects, a circuit assembly can include a substrate layer; a first pattern of deformable conductive material formed on a surface of the substrate layer using a removable stencil; and a first stacked layer configured to cover at least a portion of the first pattern of deformable conductive material.

Abstract: A flexible inductive pressure sensor, system, and method include an inductor configured to deform in multiple dimensions while maintaining inductive properties. A conductor is spaced apart from the inductor by a spacer positioned between the inductor and the conductor. The inductor has an inductance that varies based on an instantaneous distance between the inductor and the conductor. A capacitor is electrically coupled to the inductor and having a capacitance, wherein the inductor and the capacitor form a resonant circuit based on the inductance of the inductor and the capacitance of the capacitor. The resonant circuit is configured to, upon an input electrical signal applied to the flexible inductive pressure sensor, vary a voltage amplitude of an output signal based on the force applied to one or both of the inductor and the conductor and a resultant change in the impedance of the inductor.

Abstract: A sensor may include a bladder, and a deformable conductor disposed on the bladder such that deformation of the bladder causes deformation of the deformable conductor, wherein the bladder is constrained so as to enhance the deformation of the conductor in response to the deformation of the bladder. A method may include applying a stimulus to a bladder having a deformable conductor attached thereto, detecting a change in an electrical characteristic associated with the deformable conductor in response to the stimulus, and selectively constraining the bladder to amplify the change in electrical characteristic in response to the stimulus.