By Cyrielle Marjolaine.

Diagram. Publised at Sunday, November 19th 2017, 23:35:54 PM. When working with circuits, you will often find something called a schematic diagram. These diagrams use symbols to illustrate what electronic components are used and where they’re placed in the circuit. These symbols are graphic representations of the actual electronic components.

By Sasha Sara.

Diagram. Published at Sunday, December 31st 2017, 20:15:29 PM. There are two commonly used capacitor symbols. One symbol represents a polarized (usually electrolytic or tantalum) capacitor, and the other is for non-polarized caps. In each case there are two terminals, running perpendicularly into plates. The symbol with one curved plate indicates that the capacitor is polarized. The curved plate represents the cathode of the capacitor, which should be at a lower voltage than the positive, anode pin. A plus sign might also be added to the positive pin of the polarized capacitor symbol.

By Madeleine Catherine.

Power. Published at Sunday, December 31st 2017, 18:46:44 PM. Many of the new LDO regulators are optimized for low quiescent current (like 75 to 150 mA), and provide significant improvement over typical regulators which draw several milliamps.

By Jessica Mireille.

Car Wiring. Published at Sunday, December 31st 2017, 16:28:47 PM. This type of circuit is called an earth-return system any part of it connected to the car body is said to be earthed. If the battery voltage drops, less current flows, and eventually there is not enough to make the components work.

By Madeleine Catherine.

Motor. Published at Sunday, December 31st 2017, 15:23:47 PM. Inductance (L) has a property called inductive reactance, which for the purposes of this discussion may be thought of as a resistance proportional to frequency and therefore motor speed. According to Ohm’s law, current is equal to voltage divided by resistance. In this case we substitute inductive reactance for resistance in Ohm’s law and conclude motor current is the inverse of motor speed. Since torque is proportional to ampere-turns (current times the number of turns of wire in the winding), and current is the inverse of speed, torque also has to be the inverse of speed. In an ideal step motor, as speed approaches zero, its torque would approach infinity while at infinite speed torque would be zero. Because current is proportional to torque, motor current would be infinite at zero as well.

By Madeleine Catherine.

Circuit. Published at Sunday, December 31st 2017, 14:51:43 PM. 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 Jessica Mireille.

Car Wiring. Published at Sunday, December 31st 2017, 12:05:54 PM. The sudden surge of high current in a short circuit makes the fuse wire melt, or "blow", breaking the circuit. When this happens, see if there is a short circuit or a disconnection, then install a new fuse of the correct amperage rating.

By Madeleine Catherine.

Motor. Published at Sunday, December 31st 2017, 11:43:49 AM. Eddy current and hysteresis heating are collectively called iron losses. The former induces currents in the iron of the motor while the latter is caused by the re-alignment of the magnetic domains in the iron. You can think of this as “friction heating” as the magnetic dipoles in the iron switch back and forth. Either way, both cause the bulk heating of the motor. Iron losses are a function of AC current and therefore the power supply voltage.

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