1) gerbv - A Free/Open Source Gerber Viewer
You can download the source code from this page.
2) View 3D objects with STP viewer
General PCB Routing Techniques
For traces that don't need specific impedance or high current, a 10 mil trace width is fine for the vast majority of low-current analog ...
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This EMI filter includes a common-mode filter and a differential-mode filter. Generally Differential mode filter filters noise less than 3... -
I've crafted a circuit designed for high-voltage (up to 100V) and high-current (up to 33.6A) applications, specifically for switching ...