Over on Hackaday.io, [bobricius] took this technology and designed something great. It’s a GSM cell phone with a case made out of FR4. It’s beautiful, and if you’re ever in need of a beautifully ...

Most hobbyists say that it is easier to build a functional prototype of an electronic device, than to make the enclosure for it. You could say that there are a lot of ready-made enclosures on the ...

对于PCB板材来说，几乎大多数工程师都是闭眼选FR4，高频板几乎没有几个人在平台上会用的到，另外CEM1、FR1、22F等板材可能甚至都没听过。 但实际上很多低要求的产品，比如玩具或其它简答的 ...

At low frequency, a transmission line, open at one end, looks like a capacitor. After all, it is just two conductors, the signal path and the return path, with some insulation between them. This is ...

You have two voltage planes with 20 mils of FR4 between them. Will a voltage of 3 kV break down the layer of FR4. The voltage break down of FR4 is 20kV/mm and 20 mils is equivalent to .5mm. Therefore ...