By Gaspard Magalie. Car Wiring. Publised at Saturday, January 06th 2018, 02:18:13 AM. Relays are devices that utilize a central iron core fitted closely to the inside of a coil of wire. When the wire is energized the iron core will be drawn down the length of the coil, the direction dependent upon the direction of current flow. If the relays iron core is fitted with large, high current-carrying contacts it can be used as a high-current switch. Relays are used throughout cars for horns, electric fans, air conditioning clutches, etc. and the most important one is the starter solenoid.
By Mailys Laurent. Electrical Wiring. Published at Friday, December 29th 2017, 09:43:55 AM. The fixtures are usually available in a variety of designs, materials, sizes, and thicknesses. Some can carry more than one board hence allowing the processing of multiple PCBs simultaneously. Other designs have adjustments to support both the primary and secondary side processes.
By Fleurette Nina. Motor Wiring. Published at Friday, December 29th 2017, 08:52:17 AM. These are also known as canned motors. Two wires go into them. They often are directly connected to a battery. A switch turns them on. Higher voltages cause them to spin faster. Often geared down in toys, they are designed to spin fast. If turned on and forced to not spin, the motor will heat up, and may even burn up. The motor is made by copper wire covered with clear paint, and wound together in a ball. When the motor heats up too much, the paint turns into smoke, nearby copper wires connect, the motor becomes weaker, the motor heats up more, more smoke comes out, etc. The winding resistance keeps going down. Measure the winding resistance when the motor is new and measure again when there are problems.
By Dorian Yannic. Motor Wiring. Published at Friday, December 29th 2017, 07:22:49 AM. A stepper motor is a polyphase AC synchronous motor (see Theory below), and it is ideally driven by sinusoidal current. A full-step waveform is a gross approximation of a sinusoid, and is the reason why the motor exhibits so much vibration. Various drive techniques have been developed to better approximate a sinusoidal drive waveform: these are half stepping and microstepping.
By Fleurette Nina. Electrical Wiring. Published at Friday, December 29th 2017, 07:16:00 AM. I always prefer to maintain a logical flow of signals and functionality in my PCB layouts. I think that this approach results in an easier design process and a better board. The AWG layout progresses from left to right: from power input and communication input/output, to the power supply circuitry, to the processor, to the DAC (which is controlled by the processor and constitutes the board’s transition from digital to analog), to the analog signal-conditioning circuitry, and finally to the output connector. Parts that don’t have a specific position in the functional flow—such as the oscillator (U4), the DAC’s passives (C16, R5, etc.), and the voltage reference (U3)—are arranged near the components that they support.
By Cyrille Lothaire. Car Wiring. Published at Friday, December 29th 2017, 05:12:16 AM. The driven "or friction" plate runs on a splined input shaft, through which the power is transmitted to the gearbox. The plate has friction linings, similar to brake linings, on both its faces. This allows the drive to be taken up smoothly when the clutch is engaged. When the clutch is disengaged "pedal depressed", an arm pushes a release bearing against the centre of the diaphragm spring which releases the clamping pressure. The outer part of the pressure plate, which has a large friction surface, then no longer clamps the driven plate to the flywheel, so the transmission of power is interrupted and gears can be changed.
By Fleurette Nina. Car Wiring. Published at Friday, December 29th 2017, 04:22:33 AM. Push a screwdriver blade through the grommet carefully to enlarge it for the new cables, taking care not to damage insulation on existing wires. If you pass a cable through a new hole, fit the hole with a grommet. To pass wires up door pillars or behind trim, tape them to a piece of fairly stiff wire, poke it carefully behind the trim or up the pillar, and pull it through at the far end, bringing the wire with it.
By Claudine Nicolette. Electrical Wiring. Published at Friday, December 29th 2017, 03:35:52 AM. Manufacturers can use fixtures or panels to secure or frame fragile, thin, or oddly shaped PCBs. This allows them to easily fit the boards in the standard assembly, reflow, or automatic inspection machines. In addition to handling the irregular boards, the technologies enable the simultaneous processing of multiple boards as opposed to working on each board individually, hence reducing the production time and costs.
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