By Cyrille Lothaire. Electrical Wiring. Publised at Thursday, December 28th 2017, 05:00:05 AM. digital signal processor is a specialized microprocessor for the kind of algorithms employed in digital signal processing (DSP). The main goal is to accelerate the calculations while keeping the power consumption as low as possible. In this article, we review a basic addressing capability of DSP processors, i.e. circular buffering, which allows us to significantly accelerate the data transfer in a real-time system. Please note that since the acronym “DSP” stands for both “digital signal processing” and “digital signal processor," we will use the term “DSP processor” when referring to the hardware rather than the algorithm.
By Claudine Nicolette. Motor Wiring. Published at Saturday, October 07th 2017, 00:23:28 AM. Speed control via a governor is another type of servomechanism. The steam engine uses mechanical governors; another early application was to govern the speed of water wheels. Prior to World War II the constant speed propeller was developed to control engine speed for maneuvering aircraft. Fuel controls for gas turbine engines employ either hydromechanical or electronic governing.
By Cyrille Lothaire. Electrical Wiring. Published at Wednesday, October 04th 2017, 00:20:15 AM. SMT fixtures are rigid PCB carriers that allow manufacturers to load single or multiple irregular boards, and then take them through the standard processing machines. This makes it possible to carry out tasks such as automatic mounting of electronic components, infra-red reflow soldering, wave soldering, automatic testing, etc.
By Mailys Laurent. Electrical Wiring. Published at Monday, October 02nd 2017, 21:00:02 PM. The decoupling capacitors (C4, C5, C6, C7, C9, C10, C11) are arranged around the perimeter of the chip, very close to their respective power pins and to the vias that connect the caps to the internal planes. Notice how the smaller cap is always closer to the power pin; this is because we rely more on the lower-value capacitor for high-frequency bypassing, and thus the first priority is minimizing the inductance and resistance between the smaller cap and the pin.
By Cyrille Lothaire. Electrical Wiring. Published at Sunday, October 01st 2017, 20:21:48 PM. 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.
By Dorian Yannic. Electrical Wiring. Published at Saturday, September 30th 2017, 19:13:18 PM. There are different panelization and de-panelization methods depending on the application of the PCB, thickness, shape, component layout, type of edges, and other factors. The two popular methods are the V-groove panelization and the breakaway tab panelization. Each of these uses a different method to separate the boards from the main array and has its advantages and limitations.
By Adrienne Emmanuel. Car Wiring. Published at Wednesday, September 27th 2017, 18:52:26 PM. Starter motors fail mostly due to overheating. They are placed in a hostile, hot environment and cannot be expected to last indefinitely. Another mode of failure is a shorted or open winding. This exhibits itself as a "dead spot" on the commutator. If a brush lands on a dead spot the motor wont turn at all. A third failure-mode is a faulty pinion engagement. Sometimes the pinion assembly gets stiff or stuck due to lack of lubrication or wear. Starter motor rebuilding or replacement is required for all of these problems.
By Gaspard Magalie. Electrical Wiring. Published at Tuesday, September 26th 2017, 17:22:48 PM. You can see how all the power supply connections use large traces or copper pours. The AWG doesn’t have high current requirements, but the board house doesn’t give you a discount for using less copper, so you might as well opt for large (= low-resistance, low-inductance) traces if you have the room.
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