That said, it’s pretty easy to build using an Arduino, a GSM shield, a GPS system, and a handful of other components. The whole system is strapped and locked to the bottom of the saddle.

The code for [Karman]’s GPS cube uses the TinyGPS library for Arduino, that has a few great functions that track the number of satellites visible and report the current time.

An Arduino is a popular open-source single-board microcontroller. Learn how to program one and let the possibilities take shape.