By Cyrille Lothaire. Electrical Wiring. Publised at Thursday, December 28th 2017, 10:45:09 AM. When implementing a real-time system, we find a circular buffer critical whether we are using a DSP processor or a general purpose processor (GPP). However, with a GPP we may have to implement the circular buffer in software. As discussed in the previous section, with each new sample, we have to update the pointer which contains the address of the newest sample. With a circular buffer implemented in software, the programmer needs to take care of updating the buffer pointers after each read and write operation. When the pointer reaches the end of the buffer, the program must wrap the pointer back to the beginning of the buffer.
By Dorian Yannic. Electrical Wiring. Published at Wednesday, January 10th 2018, 17:48:38 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 Adrienne Emmanuel. Motor Wiring. Published at Wednesday, January 10th 2018, 10:58:15 AM. 3 wires. Brushless motors are more expensive than dc brushed motors. Lots of PC fans are brushless motors. The motor that drives the paper path in laser printers is brushless. They are build differently than servo or brushed motors. There are no places where metal is rubbing against metal. Brushless motors will last longer, spin faster, help batteries last longer. They have three wires instead of two. There are two types: inrunner and outrunner.
By Mailys Laurent. Motor Wiring. Published at Wednesday, January 10th 2018, 10:33:59 AM. A common type of servo provides position control. Commonly, servos are electrical, hydraulic or pneumatic. They operate on the principle of negative feedback, where the control input is compared to the actual position of the mechanical system as measured by some sort of transducer at the output. Any difference between the actual and wanted values (an "error signal") is amplified (and converted) and used to drive the system in the direction necessary to reduce or eliminate the error. This procedure is one widely used application of control theory. Typical servos can give a rotary (angular) or linear output.
By Adrienne Emmanuel. Electrical Wiring. Published at Wednesday, January 10th 2018, 09:27:23 AM. The ease of loading and unloading the PCBs, as well as the ability to handle multiple PCBs, are important in high production lines. In addition, fixtures should provide thermal protection to the heat sensitive areas of the PCB.
By Claudine Nicolette. Electrical Wiring. Published at Wednesday, January 10th 2018, 05:08:28 AM. Splices may be used within 30cm of a termination device when attaching to the pigtail spare lead of a potted termination device, to splice multiple wires to a single wire, or to adjust the wire sizes so that they are compatible with the contact crimp barrel sizes.
By Fleurette Nina. Car Wiring. Published at Tuesday, January 09th 2018, 21:34:30 PM. Brushes are used to create electrical contact to the commutator segments and when current is fed into two of the four brushes, it flows through all the loops of the armature and shoe windings and out the other two brushes. This creates a magnetic field around each loop. As the armature turns, the loop will move to a position where the current flow reverses. This constant reversal of current flow allows the armature and field coils to repel each other and spin the motor. The greater the current flowing in the coils, the greater the magnetic forces, and the greater the power of the motor.
By Olivier Constance. Motor Wiring. Published at Tuesday, January 09th 2018, 20:50:54 PM. 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.
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