By Cyrille Lothaire. Car Wiring. Publised at Saturday, December 30th 2017, 02:17:52 AM. Relays are devices that utilize a central iron core fitted closely to the inside of a coil of wire. When the wire is energized the iron core will be drawn down the length of the coil, the direction dependent upon the direction of current flow. If the relays iron core is fitted with large, high current-carrying contacts it can be used as a high-current switch. Relays are used throughout cars for horns, electric fans, air conditioning clutches, etc. and the most important one is the starter solenoid.
By Gaspard Magalie. Motor Wiring. Published at Monday, September 11th 2017, 19:50:47 PM. It appears to be falling apart like a vacuum cleaner motor. You do not need to tear these apart. Look at these wikicommons pictures. Taking apart a CD player and finding the motor is fairly easy.Start by turning it upside down and removing the screws holding the bottom plate on.
By Fleurette Nina. Motor Wiring. Published at Sunday, September 10th 2017, 11:18:59 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 Cyrille Lothaire. Motor Wiring. Published at Saturday, September 09th 2017, 08:13:56 AM. A micro controller or stepper motor controller can be used to activate the drive transistors in the right order, and this ease of operation makes unipolar motors popular with hobbyists; they are probably the cheapest way to get precise angular movements. For the experimenter, the windings can be identified by touching the terminal wires together in PM motors. If the terminals of a coil are connected, the shaft becomes harder to turn.
By Cyrille Lothaire. Electrical Wiring. Published at Wednesday, September 06th 2017, 04:45:11 AM. The tab-route or breakaway tab method is suitable for PCBs with either similar or different designs, or where it is not possible or practical to use the V-grooves. The designer leaves a perforated tabs routing space between the different or similar boards, hence allowing for separation after processing.
By Mailys Laurent. Electrical Wiring. Published at Tuesday, September 05th 2017, 03:51:19 AM. Depanelization is the process of separating the individual boards from the main array and usually depends on the panelization method applied. The choice depends on the clearance to provide at the edges of the PCB, and the presence of sensitive SMT devices, or hanging connectors near the edges. There are automatic methods, such as the laser cutting or depaneling router, as well as manual methods that involve breaking the tabs using hands or other tools.
By Dorian Yannic. Electrical Wiring. Published at Saturday, September 02nd 2017, 03:47:50 AM. Although this device uses an I2C interface with communication speeds up to 1 MHz, two of the eight pins are dedicated to Alert (pin3) and nReset (pin 6). The Alert pin is intended to be connected, if desired, to an interrupt pin on a microcontroller. According to section 3.5 (ALERT Pin) of the datasheet, "The output of the pin depends on the value of the temperature reading relative to programmable limits," and its function is "explained in a separate application note.
By Olivier Constance. Electrical Wiring. Published at Thursday, August 31st 2017, 15:24:12 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.
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