By Cyrille Lothaire. Electrical Wiring. Publised at Thursday, December 28th 2017, 10:45:09 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 Cyrille Lothaire. Electrical Wiring. Published at Friday, January 05th 2018, 12:13:08 PM. 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 Dorian Yannic. Electrical Wiring. Published at Friday, January 05th 2018, 11:51:25 AM. 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 Mailys Laurent. Motor Wiring. Published at Friday, January 05th 2018, 11:15:02 AM. Speed can be varied by either changing the voltage or pulsing the motor. Most computer controlled DC motors are pulsed. Pulses of a fixed voltage are sent to the motor, usually by an Electronic Speed Controller or ESC. A pulse of 1.5 ms causes no motion. Wider pulses cause faster spinning in one direction. Shorter pulses cause faster spinning in the opposite direction. Eventually, an overstressed ESC stops pulsing and turns one wire on and one wire off, depending on the direction.
By Cyrille Lothaire. Motor Wiring. Published at Friday, January 05th 2018, 10:25:56 AM. Dithering the stepper signal at a higher frequency than the motor can respond to will reduce this "static friction" effect. Because windings are better utilized, they are more powerful than a unipolar motor of the same weight. This is due to the physical space occupied by the windings.
By Mailys Laurent. Motor Wiring. Published at Friday, January 05th 2018, 09:37:00 AM. Electronic motors are found in kids toys, RC cars, airplanes and helicopters, printers, scanners, and fax machines. They are expensive when purchased, quantity 1, new with manual. This is because the motors are part of a supply chain that is usually just making enough to fill orders for kids toys, etc. Many can be found for sale on the internet, but very few are in stock and the price is high if they are. Often it is easier to purchase the kids toy and take it apart. The goal is to connect these motors to the arduino and then make something new with them. The goal of this document is to describe what to expect.
By Cyrille Lothaire. Electrical Wiring. Published at Friday, January 05th 2018, 09:31:29 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 Fleurette Nina. Electrical Wiring. Published at Friday, January 05th 2018, 06:48:42 AM. Care should be taken when depaneling the perforated-tab PCB array; otherwise, an incorrect method will splinter or tear the solder-mask or active surface layer. The ideal breakout method should not cause any damage to the board or transfer stress from the PCB surface to the components.
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