I’m calling it OpenChrony. It’s an open source chronograph, compatible with nerf and paintball. It is Arduino-based, and the code is publicly available, as are the part files (.stl, .step and .sldpart coming soon). I’m hoping that others will improve the design, this is only the first functional version.
OpenChrony V1.5 Writeup.pdf 1.46MB 827 downloads
OpenChrony.zip 751.42KB 667 downloads
OpenChrony1.5f.zip 753.69KB 532 downloads
Updated part files coming soon