Happy Pi Day! Every March 14th (3.14), the world takes a break to celebrate the most famous number in math. While most people think of (Pi) in terms of school geometry or actual pies, it’s actually a quiet hero in the world of ECAD (Electronic Computer-Aided Design). 

If you’ve ever wondered how a round circuit board fits so perfectly into a round plastic case, or how your high-speed internet stays so stable, you can thank Pi. Here’s a simple look at how this infinite number helps us bridge the gap between a digital design and a real-world product.

1. Building the Perfect "Landing Pad"

In the world of circuit boards, every component needs a place to sit. These are called pads. Many of these pads are perfect circles—especially for pins that go through the board or the tiny solder balls under a processor …

— Article from E-Cad Bridge —