By Adrienne Emmanuel. Motor Wiring. Publised at Saturday, January 06th 2018, 18:23:53 PM. RC servos are used to provide actuation for various mechanical systems such as the steering of a car, the control surfaces on a plane, or the rudder of a boat. Due to their affordability, reliability, and simplicity of control by microprocessors, they are often used in small-scale robotics applications. A standard RC receiver (or a microcontroller) sends pulse-width modulation (PWM) signals to the servo. The electronics inside the servo translate the width of the pulse into a position. When the servo is commanded to rotate, the motor is powered until the potentiometer reaches the value corresponding to the commanded position.
By Mailys Laurent. Motor Wiring. Publised at Friday, January 05th 2018, 11:15:02 AM. An additional limitation, often comparable to the effects of inductance, is the back-EMF of the motor. As the motor rotor turns, a sinusoidal voltage is generated proportional to the speed (step rate). This AC voltage is subtracted from the voltage waveform available to induce a change in the current.
By Mailys Laurent. Motor Wiring. Published at Sunday, October 22nd 2017, 10:52:46 AM. Outrunners and inrunners both use the same ESC. This ESC is different than that of the brushed DC motor. There are three wires going to the motor instead of two. The wiring between the ESC and the Arduino consists if the same 5 wires. The three wires give the brushless motors more pulling power. Understanding this helps understand stepper motors below.
By Olivier Constance. Electrical Wiring. Published at Saturday, October 21st 2017, 10:27:32 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 Claudine Nicolette. Car Wiring. Published at Friday, October 20th 2017, 09:41:36 AM. It is commonly known as the BENDIX type of solenoid. Such solenoids operate in three stages, the disengaged, partially engaged and engaged. In the disengaged position the drive gear is released and no current is flowing. In the partially engaged stage, current from the starter switch flows through both the pull-in and the hold-in coils.
By Adrienne Emmanuel. Motor Wiring. Published at Tuesday, October 17th 2017, 09:01:49 AM. The outrunner is already the standard motor in laser printers, copy machines, fax machines, scanners, blue ray players, cd players, where a very precise, constant speed is needed. It is also found in model helicopters, RC airplanes and other variable speed applications where there are light weight requirements. It is totally different than all other motors.
By Fleurette Nina. Electrical Wiring. Published at Thursday, October 12th 2017, 05:54:44 AM. In a demanding application, we may not have the time to continuously check the pointers to see if they have reached the end of the buffer and wrap them back to the beginning of the buffer when necessary. As a result, a DSP processor uses dedicated hardware to provide some fast circular buffers.This hardware implementation automatically checks the status of the pointers and updates them accordingly.
By Dorian Yannic. Electrical Wiring. Published at Tuesday, October 10th 2017, 02:36:22 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 Claudine Nicolette. Motor Wiring. Published at Saturday, October 07th 2017, 00:23:28 AM. Stepper motor performance is strongly dependent on the driver circuit. Torque curves may be extended to greater speeds if the stator poles can be reversed more quickly, the limiting factor being a combination of the winding inductance. To overcome the inductance and switch the windings quickly, one must increase the drive voltage. This leads further to the necessity of limiting the current that these high voltages may otherwise induce.
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