Systems, structures, circuits, packages and methods provide low-power devices such as sensors and sensor packages having one or more Wiegand coils that can be used for activation of a sensor or other device, as well as potentially supplying operating power...

The present invention discloses a system for detecting proper positioning of an accessory, including an electronic device and a to-be-attached accessory. The electronic device includes a first attachment component, a magnetometer, and a processor. The to-b...