By Dorian Yannic. Electrical Wiring. Publised at Saturday, September 30th 2017, 19:13:18 PM. The datasheet goes on to say that "the nRESET pin is internally connected to VDD with a pull up resistor of 50 kΩ." So... why are there two options for how to configure the nReset pin when it is not being used? Why not just recommend that it should be left floating (since it is already pulled high internally)? And, if there are indeed technical reasons for when the pin should be externally pulled up to VDD (for better noise immunity, as an example) then let us know what those technical reasons are.
By Fleurette Nina. Motor Wiring. Published at Monday, December 04th 2017, 21:51:01 PM. After the retaining ring is removed, the entire assembly that spins can be removed. There may be some resistance that feels like removing magnets from each other. Underneath the cup of all outrunner brushless motors is a series of coils. On some motors, between the coils, are hall effect probes. Hall effect probes detect the spinning magnetic field and provide a pulse out of the brushless motors to the electronics. From this pulse the electronics can precisely control the speed of the motor
By France Barbara. Motor Wiring. Published at Saturday, December 02nd 2017, 17:02:52 PM. 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.
By Claudine Nicolette. Electrical Wiring. Published at Thursday, November 30th 2017, 15:12:14 PM. You can also see that I’ve made it very easy for heat to move away from the regulator (U1) and into the ambient environment or into other portions of the PCB. U1’s thermal tab is connected to a large copper pour, and this copper pour is shot through with vias that conduct heat down to the internal ground plane. If I were really worried about thermal issues I could also connect these vias to a copper pour on the bottom side of the board, but in this case, it would have been total overkill.
By France Barbara. Motor Wiring. Published at Wednesday, November 29th 2017, 13:27:40 PM. The two wires of the brushed dc motor can be thought of as forward and reverse. The three wires of brushless can be thought of as 1, 2 and 3. Going forward would be this sequence 1-2, 2-3, 3-1, 1-2, etc. Going backwards would be 1-3, 3-2, 2-1, 1-3, etc. What this means is that one third of the motor is helping maintain momentum while another third is pulling the motor in a new direction.
By Mailys Laurent. Electrical Wiring. Published at Tuesday, November 28th 2017, 06:55:28 AM. V-groove panelization involves cutting a third of the board’s thickness from the top and bottom sides. The remaining part joins the separate boards and is then cut with a machine during the depaneling. This helps to reduce the stress on the PCB. One challenge with the V-groove method is that it is restrictive and cannot be used with PCBs that have overhanging components over the edges.
By Olivier Constance. Car Wiring. Published at Monday, November 27th 2017, 06:22:09 AM. Rubber grommets are used where wirespass through holes drilled in the bodywork,to prevent sharp edges cutting theinsulation. Cable clips The loom and individual cables areheld to the bodywork by various types of clips.
By Cyrille Lothaire. Motor Wiring. Published at Thursday, November 23rd 2017, 17:35:26 PM. Variable speed motors do not necessary have the hall effect probes. The electronics in the ESC pulses the motor to tell it is initial direction and some other feed back system humans using RC or an autopilot reading accelerometers or gyros adjusts the speed.
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