Embodiments of the invention provide for a drop-in solid-state relay replacement for current standard relays. The drop-in solid-state relay may comprise receiving an input power and actuating at least one transistor to provide power to operational equipment. In some embodiments, an optical isolator may be disposed at an output driver stage of the relay circuit to provide electrical isolation between the input stage and the output stage. The drop-in solid-state relay may provide low input voltage, low heat, no noise, and not produce fly-back.

Embodiments of the invention provide for a drop-in solid-state relay replacement for current standard relays. The drop-in solid-state relay may comprise receiving an input power and actuating at least one transistor to provide power to operational equipment. In some embodiments, an optical isolator may be disposed at an output driver stage of the relay circuit to provide electrical isolation between the input stage and the output stage. The drop-in solid-state relay may provide low input voltage, low heat, no noise, and not produce fly-back.

An example playback device includes a first interface for receiving a first audio signal from a first audio source; a second interface for receiving a second audio signal from a second audio source; and a processor configured to: cause the playback device to playback the second audio signal; determine that the first audio signal is present at the first interface; in response to determining that the first audio signal is present at the first interface, (i) cease playback of the second audio signal being played by the playback device and (ii) cause the playback device to playback the first audio signal; receive an instruction to stop the playback device from playing the first audio signal while the first audio signal is still present at the first interface; and arm the playback device such that a subsequent presence of the first audio signal at the first interface causes the playback device to play the first audio signal.

An example playback device includes a first interface for receiving a first audio signal from a first audio source; a second interface for receiving a second audio signal from a second audio source; and a processor configured to: cause the playback device to playback the second audio signal; determine that the first audio signal is present at the first interface; in response to determining that the first audio signal is present at the first interface, (i) cease playback of the second audio signal being played by the playback device and (ii) cause the playback device to playback the first audio signal; receive an instruction to stop the playback device from playing the first audio signal while the first audio signal is still present at the first interface; and arm the playback device such that a subsequent presence of the first audio signal at the first interface causes the playback device to play the first audio signal.

A micro power distribution block comprises: an enclosure; a connector, the connector comprising a power input terminal, a power output terminal, a ground terminal, and a reset terminal; and a circuit member disposed within the enclosure and operatively connected to the connector. The circuit member includes a relay coupled to the power input terminal. The relay is configured to switch between an ON state and an OFF state. The circuit member also includes a feedback sensor configured to sense power flow through the relay in the ON state. The circuit member further includes a control circuit configured to: (a) generate a relay control signal for switching the relay from the ON state to the OFF state based on a magnitude of the sensed power flow, and (b) receive a reset signal, via the reset terminal, for switching the relay from the OFF state to the ON state.

A wearable acoustic transducer includes a communication part for performing communication and speaker and control modules. The speaker module includes an enclosure having an inner space, a first opening in which a speaker part is mounted being formed in a first side surface thereof, a second opening in which a passive vibration part is mounted being formed in a second side surface thereof, the speaker part configured to emit sound, and a passive vibration part for relieving air stiffness in the inner space of the enclosure. The control module performs gain correction on an electric signal including sound or voice that is received from the communication part according to prestored gain correction data and applies the gain-corrected electric signal to the speaker part, or generates an electric signal corresponding to the gain correction data and applies the electric signal to the speaker part.

A coupling mechanism for coupling an electronic device to an outer casing includes a plurality of hook-shaped brackets interposed between a front cover and a rear cover of the electronic device, where the plurality of hook-shaped brackets pass through an accommodation hole of the outer casing and are held to hook the outer casing while the front cover and the rear cover are coupled to each other; a plurality of main bracket-mounted portions defined in the front cover, where each of the plurality of hook-shaped brackets is mounted into each of the plurality of main bracket-mounted portions; and a plurality of auxiliary bracket-mounted portions disposed on the rear cover, where each of the plurality of auxiliary bracket-mounted portions is engaged with each of the plurality of hook-shaped brackets when the front cover and the rear cover are coupled to each other.

A coupling mechanism for coupling an electronic device to an outer casing includes a plurality of hook-shaped brackets interposed between a front cover and a rear cover of the electronic device, where the plurality of hook-shaped brackets pass through an accommodation hole of the outer casing and are held to hook the outer casing while the front cover and the rear cover are coupled to each other; a plurality of main bracket-mounted portions defined in the front cover, where each of the plurality of hook-shaped brackets is mounted into each of the plurality of main bracket-mounted portions; and a plurality of auxiliary bracket-mounted portions disposed on the rear cover, where each of the plurality of auxiliary bracket-mounted portions is engaged with each of the plurality of hook-shaped brackets when the front cover and the rear cover are coupled to each other.

The object of the invention is a distribution system with an electronic fuse terminal and at least one first series terminal, wherein the electronic fuse terminal and the at least one first series terminal are arranged immediately adjacent to one another on a mounting rail, and wherein the electronic fuse terminal and the at least one first series terminal each have at least one adjacent bridging member, wherein the electronic fuse terminal can be supplied with input voltage, with the electronic fuse terminal making at least one protected first output potential available, and wherein the protected first output potential is forwarded to the first series terminal by means of a first bridging plug to the first series terminal.

The object of the invention is a distribution system with an electronic fuse terminal and at least one first series terminal, wherein the electronic fuse terminal and the at least one first series terminal are arranged immediately adjacent to one another on a mounting rail, and wherein the electronic fuse terminal and the at least one first series terminal each have at least one adjacent bridging member, wherein the electronic fuse terminal can be supplied with input voltage, with the electronic fuse terminal making at least one protected first output potential available, and wherein the protected first output potential is forwarded to the first series terminal by means of a first bridging plug to the first series terminal.