Arduino is a programmable circuit board that makes it possible for the average developer to build custom hardware products.

So [Todd] has set out to build an Arduino frequency counter for a ... add external component to facilitate this. That extra circuit design will be the topic of the next project segment.

This stemmed from a review of a friend’s circuit design that used the UART in the ... for those rolling their own boards out of an Arduino-based prototype, but it will work in any situation ...