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Why? It’s a very simple way to identify power nets (especially in layout), makes it simple to filter or order power nets , it’s very simple to use them in rules
Why? Crosstalk depends on speed of rising / falling signal edge (how fast signal changes from low to high or high to low).
It takes just 15 hours to design your own customized Arduino. This is Lesson 7 of Learn to Design Your Own Boards Online Course. The course is step-by-step video which shows the complete Schematic Design & PCB Layout of Arduino like board.
More information about the full course can be found at http://www.fedevel.com/academy/online-want-to-design-your-own-arduino-board/
This video explains how to setup xSignals and do length matching in Fly-by & T-Branch DDR3 memory layout. It also shows how to setup xSignals with passive components (e.g. series termination resistors or AC coupling capacitors) + adds some comments on how xSignals calculates the length and what is useful about them.
This video describes the changes between VIA settings in the Old and New Altium Designer.
This video explains how to do component placement & probing in the Old and in the New Altium Designer.
Sometimes you may want to insert drawings of your board into some documents (for example manual). The simple and nice way to do it, is to use your 3D PDF. Have a look …
If you would like to see how your PCB board would look in an enclosure or in a box, it’s very easy to do. This is a simple DesignSpark tutorial about creating a box around PCB.