A magnetic sensing device including a U-shaped magnet with a pair of legs and a base defining a first interior channel and a distal plane. A sensor assembly in the first interior channel includes a sensor that extends above the distal plane. The magnet generates a first region of low or no flux above the distal plane in a first position of the magnet, a second region of low or no magnetic flux in the interior channel in a second position of the magnet, and a third region of magnetic flux above the distal plane in the second position of the magnet which causes the sensor to activate a control signal. The base includes steps and a second interior channel that opens into the first interior channel.

A wireless sensor for an associated machine or machine part which includes a communications module that wirelessly transmits data related to the associated machine or machine part. The communications module is mounted on the sensor and the sensor is disposed under the bottom side of the control circuitry. A sensor is configured to measure one or more properties of the associated machine or machine part.

Embodiments describe herein generally pertain to implantable medical device (IMDs), and methods for use therewith, that can be used to automatically switch an IMD from its normal operational mode to magnetic resonance imaging (MRI) safe mode, and vice versa, within increased specificity. A controller of an IMD is configured to use an accelerometer to determine whether a positional condition associated with a patient is detected, and control sampling of a magnetic field sensor or at least one signal output therefrom, such that a first sampling rate is used when the positional condition is detected, and a second sampling rate, that is slower than the first sampling rate, is used when the positional condition is not detected, to thereby conserve power. Based on results of the sampling, the controller determines whether a magnetic field condition is detected, and in response thereto performs a mode switch to an MRI safe mode.

Disclosed are methods, systems, and devices related to optical helicity-dependent switching of monolithic multilayer nanostructures in a variety of geometries using femtosecond meta-circularly polarized optical pulses at ambient temperature. In an example embodiment, a method for switching magnetization is provided. The method includes: receiving by a metasurface, positioned on a first side of a substrate and comprising a plurality of nanostructured resonators, one or more linearly-polarized femtosecond optical pulses; receiving by a magnetic medium, positioned on a second side of the substrate opposite to the first side, the RCP light or the LCP light, after traversing through the substrate, at one or more locations of the magnetic medium; and selectively inverting a magnetization of the magnetic medium at the one or more locations based on the receiving of the RCP light or the LCP light by the magnetic medium.

A device includes a first electronic component and a case, wherein the case includes a first charging compartment configured to accommodate and charge the first electronic component. The device further includes a first magnet included in the first electronic component and a 3D magnetic field sensor included in the case. The device further includes a detection unit configured to detect a position of the first electronic component relative to the first charging compartment based on a magnetic field sensed by the 3D magnetic field sensor.

Magnetic sensing device integrated in a magnetic switch device that makes or breaks contact in the presence of an external magnetic field, comprising: a first transistor biased at a first terminal by a first bias voltage and a first magnetoresistive element having a first resistance variable with the external magnetic field. At a reference field strength, the first resistance has a first reference resistance value, and the first bias voltage is adjustable to control a first current at the second terminal of the first transistor at a first reference current value. When the external magnetic field is varied around the reference field strength, the first variable resistance varies around the first reference resistance value by a resistance delta, such that the first current modulates around the first reference current value by a current delta. A magnetic switch device comprising the magnetic sensing device is also disclosed.

A system for detecting a presence of a feature or function of an output device used with an electronic device. The system includes a connector associated with the output device, the connector having a magnetic region comprising one or more magnetized members to provide a magnetic field. The system further includes a magnetic sensor associated with the electronic device, the magnetic sensor being positioned proximate a connection port of the electronic device, the connection port being configured to receive the connector to enable the magnetic sensor to detect a presence of the magnetic field and to determine the feature or function of the output device. The system further includes control logic associated with the magnetic sensor, the control logic controlling the electronic device based on the presence of the magnetic field and according to the determined feature or function of the output device.