Electronic enthusiasts and Raspberry Pi users may be interested in a new PCB ruler created by Ian Dunn. The PCP ruler features plenty of useful annotations, equations and Raspberry Pi GPIO references.

A PCB ruler is a common promotional item, or design exercise. Usually they have some sample outlines and holes as an aid to PCB design, but sometimes they also incorporate some circuitry. [Clovis ...

It’s always good to get reader submissions on MbM, so thanks to Ian P for sending this one in. It’s a little “PCB ruler” that is embellished with markings to indicate trace width, a wire gauge chart ...