By Adrienne Emmanuel. Electrical Wiring. Publised at Saturday, January 06th 2018, 01:57:12 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 Claudine Nicolette. Car Wiring. Published at Monday, January 01st 2018, 13:12:01 PM. Solder the wire to the connector with just enough solder to secure all the strands. Let the connector cool before sliding the cover back. Fitting a bullet connector. Remove insulation with a wire stripper. Use a wire stripper to remove about 3/8 in. (10 mm) of insulation from the end of the wire.
By Adrienne Emmanuel. Electrical Wiring. Published at Monday, January 01st 2018, 12:49:27 PM. Sensirion provides detailed information on both the package outline and the land pattern. In fact, it is recommended, because the IC pad pitch is just 0.5 mm, that only one solder mask opening should be used for all four pads on one side. It is also suggested, when using solder paste printing, that a laser-cut stainless steel stencil with trapezoidal walls and with a stencil thickness of 0.1 or 0.125 mm should be used. See the images below. This information should be quite helpful for a PCB layout design team.
By Mailys Laurent. Electrical Wiring. Published at Monday, January 01st 2018, 12:00:38 PM. You can see how all the power supply connections use large traces or copper pours. The AWG doesn’t have high current requirements, but the board house doesn’t give you a discount for using less copper, so you might as well opt for large (= low-resistance, low-inductance) traces if you have the room.
By Olivier Constance. Car Wiring. Published at Monday, January 01st 2018, 11:51:08 AM. This system uses a metal wire embedded underneath the road as a guide for the battery powered vehicles. This wire is flexible enough to be used on straights, curves and hills. The vehicles are fitted with a motorised chassis and rechargeable battery which pushes the vehicle forwards via a small motor and gear arrangement, following the guide wire. The magnet offset to one side on the chassis is what activates the various additional modules (more on those later).
By Cyrille Lothaire. Electrical Wiring. Published at Monday, January 01st 2018, 10:24:51 AM. To overcome these challenges, engineers may use SMT fixtures or the panelization techniques. Each of the two methods provides a carrier with standard dimensions and provisions for fitting, securing and supporting the irregular boards.
By Gaspard Magalie. Electrical Wiring. Published at Monday, January 01st 2018, 07:06:16 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 Adrienne Emmanuel. Electrical Wiring. Published at Monday, January 01st 2018, 05:49:16 AM. However, the SMT components and the traces must be at least 3.00 mm from the perforation holes. This prevents the damage to the PCB or components which can occur due to surface stress and splinter when separating the boards. One drawback with this method is that it may leave some unwanted board protrusions on the edges.
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