By Charlotte Myriam. Circuit. Publised at Monday, December 18th 2017, 13:45:45 PM. A capacitor is a device that stores energy in the form of voltage. The most common form of capacitors is made of two parallel plates separated by a dielectric material. Charges of opposite polarity can be deposited on the plates, resulting in a voltage V across the capacitor plates. Capacitance is a measure of the amount of electrical charge required to build up one unit of voltage across the plates.
By Charlotte Myriam. Diagram. Published at Wednesday, December 27th 2017, 00:59:04 AM. Circuits often require output devices to communicate their state to an user. Examples of electronic output devices include computer monitors, LCD alphanumeric panels (as on a calculator), small lamps or light-emitting diodes (LED), etc. Digilent boards include different output devices, but all of them include some number of individual LED, and seven-segment LED displays that can display the digits 0-9 in each digit position (each segment in the seven-segment display contains a single LED). LED are two-terminal semiconductor devices that conduct current in only one direction (from the anode to the cathode). The small LED chips are secured inside a plastic housing, and they emit light at a givenfrequency (RED, YELLOW, etc.) when a small electric current (typically 10mA to 25mA) flows through them.
By Alix Loane. Circuit. Published at Wednesday, December 27th 2017, 00:57:22 AM. If the components of the circuit are connected in one single path is it termed as series. The same current would flow through all the components while the voltage would differ from one component to another. For example you have lit three lamps in series to the same power source, the first one would receive more voltage than the last.
By Bertille Solange. Circuit. Published at Wednesday, December 27th 2017, 00:32:02 AM. The real part and imaginary part of impedance are interpreted as a resistive part that dissipates energy and a reactive part that stores energy. Resistors can only dissipate energy and therefore their impedances have only a real part. Capacitors and inductors can only store energy and therefore their impedances have only an imaginary part. When resistors, capacitors, and inductors are combined, the overall impedance may have both real and imaginary parts. It is important to note that the definition of impedance preserves the definition of resistance.
By Bertille Solange. Diagram. Published at Wednesday, December 27th 2017, 00:30:05 AM. A PCB Layout is the resulting design from taking a schematic with specific components and determining how they will physically be laid out on a printed circuit board. To produce a PCB Layout, you must know the connections of components, component sizes (footprints), and a myriad of other properties (such as current, frequencies, emissions, reflections, high voltage gaps, safety considerations, manufacturing tolerances, etc.).
By Jessica Mireille. Power. Published at Tuesday, December 26th 2017, 23:57:09 PM. To prevent this occurrence, the current limit circuit will override the voltage control loop, and cut down the drive to the pass transistor so that the maximum safe current level is not exceeded .
By Sasha Sara. Amplifier. Published at Tuesday, December 26th 2017, 23:51:43 PM. As I mentioned earlier there is a third "ground" the case or chassis. Here there can be two distinct issues. As part of many electrical codes all exposed metal parts of AC mains electrically powered equipment must be either connected to the "earth" ground or doubly insulated from any electrical connections. This is to protect the user in case there is an internal failure. Any potentially dangerous voltages will be "grounded" to the earth. So I use three wire connections all the time. The "earth" ground from the AC mains is directly connected to the chassis at the entry point. As a note of interest I also use the standard IEC connectors that are found on nearly all personal computers to connect to the AC mains. This makes it easy to move equipment around and you do not have the AC cord permanently affixed to the equipment. In addition to protecting the user from shock hazards, the case now acts as an EMI shield. Any external EMI is diverted to the earth ground via the power cord.
By Alix Loane. Circuit. Published at Tuesday, December 26th 2017, 21:47:43 PM. When multiple components are connected in parallel, the voltage drop is the same across all components. When multiple components are connected in series, the total voltage is the sum of the voltages across each component. These two statements can be generalized as Kirchoff’s Voltage Law (KVL), which states that the sum of voltages around any closed loop (e.g. starting at one node, and ending at the same node) is zero.
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