Synchrophasor technology is transforming the way the power grid is being monitored thanks to the benefits provided by synchronized Phasor Measurement Units (PMUs). To exploit these benefits, future power engineers need better understanding of how PMUs work at all levels, from hardware components to phasor estimation methods implemented in software. However, hands-on experiences with these technologies allowing students to “tinker” with a PMU are limited. The FluxPMU project aims to enable students to explore and build an open source, low cost PMU. Building from the legacy of OpenPMU V1, FluxPMU provides a Do-it-Yourself (DIY) guide with all documentation and software sources required to build the FluxPMU, which can be found in the following Github repository: https://github.com/alsetlab/fluxpmu. This paper summarizes the authors’ efforts in creating this Maker’s Guide.