By Cyrille Lothaire. Car Wiring. Publised at Saturday, December 30th 2017, 02:17:52 AM. Use a 25-65 watt iron for most work, and a 150-250 watt one for large cables, or an 8 oz (225 g) gas-heated iron. Working safelyDisconnect both terminals of the battery before doing any work on wiring other than testing. Whenever you work on the car, watch for any part of the loom coming loose from its clips, for there is a risk of it getting trapped or burned. Always replace wiring in its clips.
By Dorian Yannic. Car Wiring. Published at Thursday, December 28th 2017, 11:54:02 AM. Wires and bundles of wires are clipped to the bodywork to keep them out of the way. Where they run through a hole, the sharp edges are lined with a rubber grommet. Sometimes the loom is divided into sections joined by multi-pin plugs and sockets, so that it can be removed and refitted section by section.
By Claudine Nicolette. Electrical Wiring. Published at Thursday, December 28th 2017, 11:33:40 AM. It’s always good to be cognizant of trace lengths when you’re laying out a parallel bus, though at moderate frequencies it is nothing to stress about. The propagation time for a signal traveling through a trace is maybe 150 picoseconds/inch. So if you have two traces with a length mismatch of one inch, one signal will arrive 150 ps after the other signal. If your signals are transitioning at a frequency whose corresponding period is much greater than 150 ps, this one-inch mismatch won’t cause problems. Even at 100 MHz (which is pretty fast for a parallel bus), the period is 10 ns, i.e., ~67 times larger than the time-of-arrival discrepancy for a one-inch mismatch.
By Fleurette Nina. Car Wiring. Published at Thursday, December 28th 2017, 11:30:31 AM. Joins in individual wires are usually made with crimp connectors. The colour on the sleeve of a connector denotes the size of wire it will take. The bared ends of each wire are pushed into opposite ends of the metal-lined plastic sleeve, and squeezed with crimping pliers. There are multiple sleeves or other special connectors where a wire branches off.
By Cyrille Lothaire. Electrical Wiring. Published at Thursday, December 28th 2017, 10:45:09 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 Olivier Constance. Car Wiring. Published at Thursday, December 28th 2017, 10:09:08 AM. Use insulating tape in a spiral to bind wires together. If you have to lead a new wire along a difficult route - to the rear of the car, for example - you could take the opportunity to lead a spare wire at the same time, for any accessory you might want to fit later. Cover the end of a spare wire with insulating tape to prevent an electrical short circuit. Identifying cable sizes 14/30 cable 65/30 cable High-tension (HT) lead The starter cable Types of cable.
By Gaspard Magalie. Motor Wiring. Published at Thursday, December 28th 2017, 10:08:52 AM. Brushed DC motors rotate continuously when DC voltage is applied to their terminals. The stepper motor is known by its property to convert a train of input pulses (typically square wave pulses) into a precisely defined increment in the shaft position. Each pulse moves the shaft through a fixed angle. Stepper motors effectively have multiple "toothed" electromagnets arranged around a central gear-shaped piece of iron. The electromagnets are energized by an external driver circuit or a micro controller. To make the motor shaft turn, first, one electromagnet is given power, which magnetically attracts the gear teeth. When the gear teeth are aligned to the first electromagnet, they are slightly offset from the next electromagnet.
By Olivier Constance. Electrical Wiring. Published at Thursday, December 28th 2017, 07:48:26 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.
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