electrical engineering
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A semiconductor and a transistor are closely related, but they are not the same thing. A semiconductor is a class of material—most commonly silicon—whose electrical conductivity can be precisely controlled. By modifying semiconductor material through processes such as doping, engineers can create regions that either provide or restrict the movement of electrical charge. These properties…
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An electrical schematic is a symbolic representation of how components within an electrical or electronic system are connected. Rather than attempting to reproduce the physical appearance of a circuit board or machine, schematics use standardized symbols to describe components and electrical relationships. A technician can therefore examine a schematic and understand the intended current paths,…
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A bushing transformer is a power transformer component that uses electrical bushings to safely carry high-voltage electrical current through the grounded steel tank of the transformer without allowing electricity to short to the enclosure. Bushings provide electrical insulation while creating a secure connection between the transformer’s internal windings and the external power system. They are…
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Imagine looking through an ordinary window that is quietly producing electricity throughout the day. That vision is moving closer to reality as researchers in South Korea continue developing transparent solar cell technology capable of generating power while remaining clear enough for everyday use. Instead of absorbing visible light like traditional solar panels, these advanced photovoltaic…
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Before outlets, switches, and light fixtures can be installed, electricians complete the electrical rough-in—the phase where the building’s hidden electrical infrastructure is installed before insulation and drywall. During the rough-in, electricians mount electrical boxes, drill pathways through framing members, route branch-circuit wiring, secure cables, and position the system according to the electrical plans. Because these…
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Bremsstrahlung, meaning “breaking radiation” in German, is the electromagnetic radiation produced when a charged particle, typically an electron, is decelerated or deflected by the electric field of an atomic nucleus. As the electron slows down or changes direction, the lost kinetic energy is emitted as photons, often in the X-ray range. This process is a…
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A string inverter is a centralized power conversion device used in solar energy systems to transform direct current (DC) electricity generated by multiple photovoltaic (PV) panels into alternating current (AC) electricity suitable for use in homes, businesses, or the electrical grid. In this configuration, solar panels are electrically connected in series to form a “string,”…
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Solar inverters are essential devices in photovoltaic (PV) systems that convert the direct current (DC) electricity generated by solar panels into alternating current (AC) electricity, which is compatible with household appliances and the utility grid. They serve as the “brain” of a solar energy system, not only enabling energy conversion but also managing system performance,…
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PV modules, commonly known as solar panels, are the foundational units of solar energy systems. Each module contains numerous photovoltaic cells—usually made from monocrystalline or polycrystalline silicon—that work together to generate electricity through the photovoltaic effect. These cells are embedded between layers of protective materials: a front layer of tempered glass for durability and light…
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This DIY electronic solar tracker is a clever and simple project that helps a small solar panel automatically follow the sun to capture the maximum amount of sunlight throughout the day. The schematic illustrates a simple automatic solar tracker that uses two light-dependent resistors (LDRs) to sense the direction of the brightest sunlight and drive…
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A lattice atom refers to an atom that occupies a regular, repeating position within the crystal lattice of a solid material. In crystalline solids, atoms are arranged in a highly ordered structure known as a lattice, where each atom is situated at a specific point defined by the geometry of the unit cell. These lattice…
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Wavelength Dispersive Spectroscopy (WDS) is an analytical technique used in electron microscopy to determine the elemental composition of materials with high precision. In WDS, characteristic X-rays emitted from a sample are diffracted by a crystal and separated based on their wavelength before being detected. This method provides excellent spectral resolution, allowing researchers to distinguish between…
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