By Lydie Honorine. Circuit. Publised at Friday, December 22nd 2017, 23:34:06 PM. In the hydrodynamic analogy of electronic circuits, resistors are equivalent to a pipe. As fluid flows through a pipe, frictional drag forces at the walls dissipate energy from the flow and thus reducing the pressure, or equivalently, the potential energy of the fluid in the pipe. A small resistor is equivalent to a large diameter pipe that will allow for a high flow rate, whereas a large resistor is equivalent to a small diameter pipe that greatly constricts the flow rate.
By Madeleine Catherine. Diagram. Publised at Wednesday, July 05th 2017, 04:09:04 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 Bertille Solange. Motor. Published at Friday, January 12th 2018, 19:26:20 PM. A real step motor has losses that modify the ideal speed-torque curve. The most important effect is the contribution of detent torque. Detent torque is usually specified in the motor datasheet. It is always a loss when the motor is turning and the power consumed to overcome it is proportional to speed. In other words, the faster the motor turns the greater the detent torque contributes power loss at the motor’s output shaft. This power loss is proportional to speed and must be subtracted from the ideal, flat output power curve past the corner speed. This now constitutes a practical speed-torque curve.
By Jessica Mireille. Motor. Published at Friday, January 12th 2018, 18:05:28 PM. The motor power output (speed times torque) is determined by the power supply voltage and the motor’s inductance. The motor’s output power is proportional to the power supply voltage divided by the square root of the motor inductance.
By Madeleine Catherine. Diagram. Published at Friday, January 12th 2018, 13:55:46 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 Lydie Honorine. Diagram. Published at Friday, January 12th 2018, 09:12:04 AM. On all but the simplest PCBs, wires must be printed on more than one surface of fiberglass to allow for all the required component interconnections. Each surface containing printed wires is called a layer. In a relatively simple PCB that requires only two layers, only one piece of fiberglass is required since wires can be printed on both sides. In a more complex PCB where several layers are required, individual circuit boards are manufactured separately and then laminated together to form one multi-layer circuit board. To connect wires on two or more layers, small holes called vias are drilled through the wires and fiberglass board at the point where the wires on the different layers cross. The interior surface of these holes is coated with metal so that electric current can flow through the vias. Most Digilent boards are simple four or six layer boards; some more complex computer circuit boards have more than 20 layers.
By Madeleine Catherine. Car Wiring. Published at Friday, January 12th 2018, 06:20:13 AM. When fitting extra accessories, such as a rear window heater which consumes a heavy current, always wire it through the ignition switch. Some ancillary components can be operated without the ignition turned on by turning the switch to the "auxiliary" position. A radio is usually wired through this switch, so that it can be played with the engine off.
By Madeleine Catherine. Motor. Published at Thursday, January 11th 2018, 18:44:58 PM. It is recommended the motor current always be set at the rated value also to get the best microstep smoothness. Setting the current higher degrades the linearity of the motor and causes microstep bunching and attendant low-speed vibration.
By Lydie Honorine. Car Wiring. Published at Thursday, January 11th 2018, 18:31:10 PM. As we stated, always use closed terminals. If your terminals have the plastic cover, remove that. Always solder the terminal where the wire end is installed. Never crimp the terminal and expect the wire to stay there forever. It won’t.
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