OpenLapTimer is an open source project that want to realize an Arduino GPS laptimer for track day.
OpenLapTimer is GPS, because with it we can save the trajectories of each lap and because we don’t need anything on the pitlane wall. The laptimer is thought to stay near the instrument panel with his LCD to show the current laptime.
The laptimer have to log all the GPS points in a file for analyze it in the box. It’s also important log all the session’s lap time.
For more detailed information see the project's wiki.
Now the best Open Source lap timer have a new GUI with big performance improvements.
To display the GUI the laptimer relies on ILI9341_due library: