By Claudine Nicolette. Car Wiring. Publised at Friday, December 29th 2017, 01:22:14 AM. Wires are usually connected to components by plastic-covered terminals which push on to a blade on the unit called a spade terminal. Nearly all types of terminals should be fitted to the wire with crimping pliers. There are a few types such as the "Scotchlok" which are secured by clips. For additional security, you can add solder to the wire.
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.
By Fleurette Nina. Car Wiring. Published at Wednesday, August 30th 2017, 14:23:30 PM. Spade terminal The spade terminal is theusual way of fixing wires to components. Crimp or bullet connector The crimpconnector is used for joining single wires toeach other. It may be a single or doubleconnector, or a multi- connector carryingseveral wires.
By France Barbara. Electrical Wiring. Published at Sunday, August 27th 2017, 10:48:35 AM. Note that U4, a 10 MHz MEMS oscillator, is also very close to the microcontroller’s clock input pin. It’s always a good idea to minimize the length of traces carrying high-frequency digital signals. First of all, there are noise benefits: a shorter, more direct trace reduces the amount of noise that would otherwise be coupled into adjacent traces, and a shorter trace also reduces electromagnetic interference (EMI) because it is less effective as an antenna. The second issue is related to transmission-line effects. Minimizing trace length is a simple way to avoid problems related to signal reflections. However, reflection is not a significant concern at frequencies in the 10 MHz range, unless you are dealing with long interconnections or a very large PCB.
By Olivier Constance. Electrical Wiring. Published at Thursday, August 24th 2017, 10:28:02 AM. Manual removal of the tabs depends on the design and thickness of the board. Extra care is required since using some tools such as the hook-shaped blade to break the solid tabs between the boards can be challenging and inefficient. For example, if the blade rotates within the small clearance between the boards, it can easily take a bite out of the useful part of the PCB. Also, taping the blade-cutting edge leaves a small part of the tab protruding from the board.
By Fleurette Nina. Electrical Wiring. Published at Saturday, August 19th 2017, 09:12:34 AM. I always prefer to maintain a logical flow of signals and functionality in my PCB layouts. I think that this approach results in an easier design process and a better board. The AWG layout progresses from left to right: from power input and communication input/output, to the power supply circuitry, to the processor, to the DAC (which is controlled by the processor and constitutes the board’s transition from digital to analog), to the analog signal-conditioning circuitry, and finally to the output connector. Parts that don’t have a specific position in the functional flow—such as the oscillator (U4), the DAC’s passives (C16, R5, etc.), and the voltage reference (U3)—are arranged near the components that they support.
By Dorian Yannic. Electrical Wiring. Published at Wednesday, August 16th 2017, 08:13:28 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 Dorian Yannic. Electrical Wiring. Published at Sunday, August 13th 2017, 05:49:48 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.
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