My latest project has turned out to be my most complex (so far…), involving both new-fangled hardware and quite a bit of software, but it’s now finished and working well.
Meet the TICC, an Arduino Mega 2560 shield that implements a two channel timestamping counter that has resolution of better than 60 picoseconds (that’s 60 trillionths of a second). TAPR did a production run (we still have them available; go to http://tapr.org/kits_ticc.html) and the units have been in peoples’ hands for a few days now. Feedback has been good.
The software and docs are on github: http://github.com/TAPR/TICC.