A method of using a hand-made circuit board for learning includes: providing a hand-made circuit board which comprises a substrate; and a medium layer disposed on a surface of the substrate to form a pattern, wherein the medium layer has a notably paintable non-conductive zone configured with a plurality of electrical blocks, and the electrical blocks are discontinuously distributed in the notably paintable non-conductive zone, so that the electrical blocks on at least one cross-section of the notably paintable non-conductive zone are not electrically connected; and drawing a drawn conductive layer on the notably paintable non-conductive zone of the pattern by an end user, wherein the drawn conductive layer has conductive particles linking the electrical particle blocks in the notably paintable non-conductive zone, thereby electrically connecting the electrical particle blocks to complete a circuit line.

A carbon allotrope composite field effect artificial aurora generating device includes an extremely low frequency power supply cabinet, a carbon allotrope composite field effect device and a cuboid-shaped water tank. The carbon allotrope composite field effect device is formed by alternately and in parallel superimposing, in a form of parallel capacitors, a plurality of planar electrode plates made of a foamed nickel deposited with a carbon allotrope composite and a plurality of planar separators made of an insulating material. A first output wire of the extremely low frequency power supply cabinet is connected to odd-numbered planar electrode plates of the plurality of planar electrode plates through a first conductive rod, and a second output wire of the extremely low frequency power supply cabinet is connected to even-numbered planar electrode plates of the plurality of planar electrode plates through a second conductive rod.

Modular frames for instructional use that provide secure mounts for geometric solids are presented. Some contemplated modular frames can be assembled into three dimensional modular devices and are particularly suitable for instructional purposes. Modular devices comprising two or more frames could be coupled via a clip in two or more different configurations. Containers including conductive material and configured to provide a Faraday cage around their contents are also provided.

A quantum state visualization device comprising at least a portion of a spherical shell and a support structure affixed to the spherical shell. A portion of the support structure can intersect a center of the spherical shell. The quantum state visualization device further comprising a indicator pivotally attached to the support structure at the portion of the support structure intersecting the center of the spherical shell. The indicator is representative of a quantum state based on its position relative to the spherical shell.

A modular electro-mechanical agent having a plurality of modules including mechanical and electrical components, that can be constructed to complete at least one pre-determined task and/or contribute in performing the at least one pre-determined task. The electro-mechanical agent can include extension modules and can be altered as per user preference to add, eliminate or modify any features of the agent for completing and/or participating in a plurality of pre-determined tasks.

The present disclosure relates to the field of decor items, and more particularly relates to a pendulum unit and a wave pendulum assembly based on the pendulum unit, wherein the wave pendulum assembly comprises a frame and a plurality of first magnetic bodies, respective first magnetic bodies being connected to the frame via strings and being hung in the air; second magnetic bodies, the amount of which is identical to that of the first magnetic bodies, the second magnetic bodies being fixedly disposed below the first magnetic bodies in a one-to-one correspondence; in the first magnetic bodies and the second magnetic bodies, at least one party may generate magnetism when being energized, such that at least one of the first magnetic body and the second magnetic body may generate magnetism when being energized, such that the first magnetic body may swing periodically in the air under a magnetic action between the first magnetic body and the second magnetic body.. The wave pendulum assembly provided by the present disclosure has beneficial effects such as a simple structure, a good reliability, and an appeal for viewing.

A method of using a hand-made circuit board for learning includes: providing a hand-made circuit board which comprises a substrate; and a medium layer disposed on a surface of the substrate to form a pattern, wherein the medium layer has a notably paintable non-conductive zone configured with a plurality of electrical blocks, and the electrical blocks are discontinuously distributed in the notably paintable non-conductive zone, so that the electrical blocks on at least one cross-section of the notably paintable non-conductive zone are not electrically connected; and drawing a drawn conductive layer on the notably paintable non-conductive zone of the pattern by an end user, wherein the drawn conductive layer has conductive particles linking the electrical particle blocks in the notably paintable non-conductive zone, thereby electrically connecting the electrical particle blocks to complete a circuit line.

A high voltage training system is provided comprising a high voltage training device in connection with one or more energized lines, and configured to detect a trigger event involving the interaction of a user with the energized lines, modulating/regulating current output in response, and engage one or more of an alert from an alert system, whereby the training system aids in the behavioral modification of the user in a training scenario. A trigger event comprises an event occurring between a user and the energized lines, or contact between a grounding conductor and the energized lines. An alert comprises one or more of an audible alarm, a visual indicator of alarm, or an electrical current (of less than 20 mA) emitted from the energized lines and contacted with the skin of the trainee engaged with the training system.

A distance learning device for providing laboratory instruction via two-way interaction with a student at a remote location and system for using same.

A modular electro-mechanical agent having a plurality of modules including mechanical and electrical components, that can be constructed to complete at least one pre-determined task and/or contribute in performing the at least one pre-determined task. The electro-mechanical agent can include extension modules and can be altered as per user preference to add, eliminate or modify any features of the agent for completing and/or participating in a plurality of pre-determined tasks.