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PCB Design Rules

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Initially PCBs were designed manually by creating a photomask on a clear mylar sheet, usually at two or four times the true size. Starting from the schematic diagram the component pin pads were laid out on the mylar and then traces were routed to connect the pads. If you have many questions of PCB Design, please come here!

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Questions about PCB design
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Antonio Semeraro

Designing a PCB board computer that is very similar to a raspberry pi or an Orange Pi. It needs to have no ports aside from Ethernet. It should plug directly into an electrical outlet and have another electrical outlet on the other side of it that can work just like a normal port outlet. The board need to have a switch that cuts off the power to the other power outlet but the computer is still powered. Is it expensive to manufacture?
Statement: This post is only the personal view of the author and does not represent the opinions of


First you can buy a few mains networking widgets with through sockets, something like the BT Broadband Extender Flex 1000 kit. Then you pull one apart, and find out what it is built from. You operate another, to see what it does. You hack a third, install linux on it, add a relay for the mains output etc. That's called research. Thus informed, you can then go to a design house with real specifications and a stab at a bill of materials.

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