An electrical connector includes an insulating housing. The insulating housing has an inner wall, a first end, and a second end. The inner wall of the insulating housing defines a cavity and a groove, the groove including a groove wall, the groove wall extending from the cavity radially into the insulating housing to a groove depth. The electrical connector also includes an electrical component in the cavity; an electrically conductive shell at an outer surface of the insulating housing; and a plug in the housing, the plug including a body and projection that radially extends from the body, the projection being received in the groove, where the groove wall applies more than 35 pounds (lbs) of force on the plug in a direction that is toward the electrical component.

Apparatus and associated methods relate to a quick-connector conversion system having a front cover and a rear module. In an illustrative example, the front cover includes apertures from which a plurality of connector ports extend through. Each connector port of the plurality of connector ports is in electrical communication with a first communication module. A rear module includes a second communication module electrically connected to a plurality of input/output (I/O) terminals such that when the front cover aligns with the rear module, the first communication module pluggably connects to the second communication module. When the first communication module and the second communication module are pluggably connected, the plurality of connector ports electrically connects to the plurality of the I/O terminals.

Apparatus and associated methods relate to a quick-connector conversion system having a front cover and a rear module. In an illustrative example, the front cover includes apertures from which a plurality of connector ports extend through. Each connector port of the plurality of connector ports is in electrical communication with a first communication module. A rear module includes a second communication module electrically connected to a plurality of input/output (I/O) terminals such that when the front cover aligns with the rear module, the first communication module pluggably connects to the second communication module. When the first communication module and the second communication module are pluggably connected, the plurality of connector ports electrically connects to the plurality of the I/O terminals.

Apparatuses, systems, and methods are disclosed for solar-powered battery charging. In a solar battery pack, one or more solar panels may be coupled to a foldable housing. A battery is also coupled to the housing. Charge control circuitry is electrically coupled to the solar panels and the battery. The charge control circuitry is configured to control power flow from the solar panels to the battery based on one or more predetermined characteristics of the solar panels.

An apparatus connectable to a streetlight luminaire includes a housing, an electrical connector, power conversion circuitry, and an output power interface. The housing has a top surface, a bottom surface, and at least one sidewall interconnecting the top and bottom surfaces. The electrical connector is integrated with the bottom surface of the housing and electromechanically connectable to a top-side electrical connector of the streetlight luminaire. The power conversion circuitry is operable to receive an input alternating current (AC) signal from the electrical connector and produce at least one output AC signal, wherein an average voltage of each output AC signal is less than an average voltage of the input AC signal. The output power interface is electrically coupled to the power conversion circuitry and integrated with the sidewall(s) of the housing. The output power interface is arranged to provide the output AC signal(s) for use external to the housing.

An apparatus connectable to a streetlight luminaire includes a housing, an electrical connector, power conversion circuitry, and an output power interface. The housing has a top surface, a bottom surface, and at least one sidewall interconnecting the top and bottom surfaces. The electrical connector is integrated with the bottom surface of the housing and electromechanically connectable to a top-side electrical connector of the streetlight luminaire. The power conversion circuitry is operable to receive an input alternating current (AC) signal from the electrical connector and produce at least one output AC signal, wherein an average voltage of each output AC signal is less than an average voltage of the input AC signal. The output power interface is electrically coupled to the power conversion circuitry and integrated with the sidewall(s) of the housing. The output power interface is arranged to provide the output AC signal(s) for use external to the housing.

A quick installed autonomous traffic and pedestrian crossroad signaling system employing a mechanical support wire spanning between at least two structural support points, and an electrified wire with a plurality of hub receptacles running alongside the mechanical support wire whereas electrified devices are coupled to the hub receptacles.

An electrical connection structure according to the present disclosure includes a glass plate, a power supply part formed on the glass plate, a connection terminal including a base part facing the glass plate, and a spring member disposed between the power supply part and the base part and configured to electrically connect the power supply part to the base part. The spring member includes a fixing part, a curved part, and contact parts. The curved part includes branch parts branched by a slit. The contact part is disposed at each of end parts of the branch parts. The contact parts are in contact with the base part independently of each other. The curved part is in contact with the power supply part at a part protruding toward the glass plate.

A light bulb holder structure and a light bulb having same, in which the bulb cap of the light bulb holder is provided with a plurality of grooves in a tactful manner, and the depth of the grooves is greater than that of the external threads of the bulb cap, such that after the bulb cap is mounted on the light bulb and the light bulb is mounted on the light socket, the water accumulated between the light bulb holder structure and the light socket can be effectively discharged through the grooves. As a result, failure of the insulator (connector) on the light bulb holder structure caused by water accumulation can be avoided to a certain extent, thereby improving the reliability and safety of the light bulb.

A charging device for a physiological signal transmitter is disclosed, wherein the physiological signal transmitter is to receive and transmit a physiological signal from a subcutaneous tissue of a living body, and has a first electrical connecting port. The charging device comprises a body including a placing portion, a charging module and an operating module. The placing portion disposes thereon the physiological signal transmitter, and includes a bearing surface and a first opening. The bearing surface disposes thereon the physiological signal transmitter, and the first opening aligns therewith the first electrical connecting port of the physiological signal transmitter. The charging module is accommodated in the body and includes a second electrical connecting port, a third electrical connecting port and a circuit assembly. The second electrical connecting port is disposed in the opening and protrusive beyond or beneath the bearing surface. The third electrical connecting port is connected to a power source. The circuit assembly is configured to control a charging on the physiological signal transmitter, and electrically connected to the second electrical connecting port and the third electrical connecting port. The operating module is accommodated in the body, and coupled with the charging module, wherein when the physiological signal transmitter is placed on the bearing surface and in a first operating state, the operating module protrudes the second electrical connecting port beyond the bearing surface to electrically connect with the first electrical connecting port.