OpenChrony - Arduino Uno chronograph
thingiverse
This is a do-it-yourself chronograph for paintball, nerf guns or any other pneumatic firearm with sufficient caliber. Not designed for use with real steel firearms due to inaccurate timing and insufficient thermal resistance of bullet gates. Source code and accompanying libraries included in "OpenChrony.zip". Full instructions are posted on NerfHaven at http://nerfhaven.com/forums/topic/28105-openchrony-open-source-diy-chronograph/. Update: V1.5 Released. The new source code is available in the file "OpenChronyV1.5f.zip". Print "V1-5_Electronics_Box_Top.stl" instead of "Electronics_Box_Top.stl". The other files remain unchanged for both versions.
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