Sensor assemblies are provided for use in modeling water systems. These sensor assemblies can be used as sensor fish. These assemblies can include a circuit board supporting processing circuitry components on either or both opposing component support surfaces of the circuit board and a housing above the circuit board and the components, with the housing being circular about the circuit board in at least one cross section, and wherein the supporting surfaces of the circuit board are substantially parallel with the plane of the housing in the one cross section.

Methods for emulating interaction of entities within water systems are provided. The methods can include introducing a sensor assembly into a water system. The sensor assembly can include: a circuit board supporting processing circuitry components on either or both of opposing component support surfaces of the circuit board; a housing about the circuit board and the components, the housing being circular about the circuit board in at least one cross section; and wherein the support surfaces of the circuit board are substantially parallel with the plane of the housing in the one cross section.

This document describes an image-capturing doorbell device. In aspects, the image-capturing doorbell device provides a compact, space-efficient, battery-powered, doorbell camera. The architecture of the image-capturing doorbell device is optimized by concentrating sensors at one end of the device and user input mechanism(s) at the opposing end of the device and including a thin and narrow middle portion between the two opposing ends. The sensors include an image sensor and a PIR sensor mounted to the same PCB for space conservation. A camera lens protrudes from an outer surface of an IR window aligned with IR LEDs to mitigate IR flare. The PIR sensor is aligned with a lens that enhances radial motion detection by implementing two stacked rows of lenslets. The user input mechanism includes a light ring formed via a two-shot molding technique with a button to bond the light ring to the button for enhanced waterproofing.

An electronic device may include a housing, a first printed circuit board being disposed in the housing and including a receiving space formed in at least a portion thereof, and a second printed circuit board being stacked (directly or indirectly) on at least a partial area of the first printed circuit board, the second printed circuit board including a first surface including a plurality of pads configured to be electrically connected with the first printed circuit board and a second surface facing in a direction opposite to the first surface. Other various embodiments are possible.

A constant-current control circuit comprising a switching circuit including a source voltage, and primary and secondary switches is provided. The primary GaNFET switch is connected with a solenoid assembly coil. The secondary switch is connected with the coil which has an inductance. From t.sub.0 to t.sub.on, the primary GaNFET switch is closed and the secondary switch is open, the source voltage is applied across the coil, and a counter EMF decays until the voltage across the coil equals the source voltage at t.sub.on, thereby allowing current to flow through the coil. From t.sub.on to T, the primary GaNFET switch is open and the secondary switch is closed, and a positive EMF equal to the source voltage is applied across the coil until the positive EMF decays to zero at T, such that the current continues to flow through the coil without the source voltage being applied across the coil.

The present disclosure provides a wireless sensing device. In an embodiment, the wireless sensing device includes (A) a button cell. The button cell has a positive electrode and a negative electrode. The device includes (B) a first printed circuit board (IPCB) located on a top surface of the button cell. The IPCB has a first contact and a second contact electrically connected to respective positive electrode and negative electrode of the button cell. The IPCB includes (i) a processor, and (ii) a wireless communication component (WCC). Each of the (i) processor, and (ii) WCC are electrically connected to the IPCB. The device includes (C) a sensor module. The sensor module includes a second PCB (2PCB) and one or more sensor chips electrically connected to the 2PCB. (D) The device has a length from 10 mm to 30 mm, a thickness from 3 mm to 10 mm and a width from 10 mm to 30 mm.

An image sensor attached to a printed circuit board is installed in a camera. A holder includes first and second rails comprising first and second printed circuit boards, respectively, and the holder is fastened to a lens mount of the camera. The holder may be fastened to captively hold the image sensor, and the image sensor may be resiliently supported when captively held. A gripper grasps the image sensor proximate to the holder and aligns the image sensor to an aligned position of the image sensor relative to the lens mount. The image sensor may be moved to the aligned position after directing an image toward the image sensor to produce a processed image for determining relative alignment. The printed circuit board is soldered to the first and/or second printed circuit board such that the holder fixedly holds the image sensor so it is unmovable in its aligned position.

A vehicular radar sensing system includes a radar sensor disposed at a vehicle so as to sense exterior of the vehicle. The radar sensor includes a housing and at least one printed circuit board (PCB). The housing includes a front housing portion and a rear housing portion. The front housing portion includes side walls with a slot therealong. The PCB is received in the slot of the front housing portion. After the PCB is received in the slot, the front housing portion and the rear housing portion are joined to establish a cavity in which the PCB is disposed.

In an embodiment, an electronic device may include a housing including a hinge module, a first housing, and second housing. The first and second housings are rotatably coupled to each other via the hinge module to be in a folded state or an unfolded state. The electronic device may further include a flexible display, at least one conductive pattern disposed in the first housing, at least one conductor disposed at a position in the second housing corresponding to the at least one conductive pattern such that the at least one conductor is capacitively coupled to the conductive pattern when the electronic device is in the folded state, and a wireless communication circuit electrically connected to the at least one conductive pattern in the first housing. Other embodiments are also possible.

A tracking tag system includes a tag case, a first tag case back plate and a second tag case back plate. The tag case has a mating surface and is configured to house a PCB having a transmitter and circuitry for controlling the transmitter. The first tag case back plate is configured to mate with the tag case to enclose and totally protect the PCB, the transmitter, the circuitry and a battery of a first type against ingress of water during immersion and against dust ingress. The second tag case back plate configured to enclose and totally protect the PCB, the transmitter, the circuitry and a battery of a second type against ingress of water during immersion and against dust ingress.

An electronic device in provided, including an antenna using a horn structure capable of using at least a portion of a metal member as a signal waveguide structure of the antenna. The device includes a housing, a display, a printed circuit board, and at least one wireless communication circuit, where a waveguide hole is provided to connect at least a portion of a through hole and an electronic component and is used as an operating channel of the electronic component together with the waveguide hole.