Abstract: In one embodiment, an indoor gardening household appliance system is disclosed. The system includes a housing, having a front side and a plurality of enclosed sides, a front side opening, a rotatable tubular shaped wall within the housing that is concentric with the opening, a backplate in attachment with the back side of the rotatable tubular shaped wall, a plurality of drawers, and at least one stop engaging a grow drawer such that the grow drawer is retained within the interior compartment. The stop includes a locked configuration for retaining the drawers within the interior compartment and an unlocked configuration for allowing a drawer to move into and out of the interior compartment. The system further includes a locked configuration having grow drawers disposed about a top arc section of the opening, and an unlocked configuration having a grow drawer disposed within the bottommost arc section of the opening.

Abstract: Technology is described for an electromagnetic apparatus and system that sorts different electrically conductive metals. In one example, an electrodynamic sorting circuit includes a wire-wound, gapped, core (WWGC) and a capacitor bank. The WWGC includes a magnetic core including a gap, and an electrical conductor coiled around the magnetic core. A current in the electrical conductor is configured to generate a magnetic field in the magnetic core and the gap. The capacitor bank is coupled in series with the electrical conductor of the WWGC. Various other circuitries, systems, devices, components, and methods are also disclosed.

Abstract: A passive low power device for detection of boundary crossings includes a dual element pyro-electric infrared (PIR) sensor. The sensor is designed with a lens that provides a very narrow field of view and two pyro-electric elements that produce a waveform with two voltage swings of opposite polarity when a warm object moves past the sensor. The waveform is filtered and amplified before it is passed on to a comparator. The comparator triggers off the extremes of each waveform. The comparator includes two outputs that are normally high, but go low when a change in infrared radiation is detected. A processor makes an approximation of the zero crossing time based on the rising edge of the first comparator output. This approximate zero crossing time serves as an estimate of the boundary crossing time.

Abstract: A passive low power device for detection of boundary crossings includes a dual element pyro-electric infrared (PIR) sensor. The sensor is designed with a lens that provides a very narrow field of view and two pyro-electric elements that produce a waveform with two voltage swings of opposite polarity when a warm object moves past the sensor. The waveform is filtered and amplified before it is passed on to a comparator. The comparator triggers off the extremes of each waveform. The comparator includes two outputs that are normally high, but go low when a change in infrared radiation is detected. A processor makes an approximation of the zero crossing time based on the rising edge of the first comparator output. This approximate zero crossing time serves as an estimate of the boundary crossing time.