[StuBeeDoo]

My rally loop is controlled by an SCX Rally Chrono.  As you may be aware, the Chrono has limitations on the number of laps - 1, 5, 10, 15, or 20.  I can't remember what the limitation is on individual lap time, but I think it might be 9'59.99".  It would be nice to be able to have some track action a little different to what the Chrono allows.

I have an Arduino R3 Starter Kit that has sat unopened for at least 5 years and I would like to be able to use it to build a timer that would count-up to 20+ minutes with seconds to 2 decimal places.  I would want it to be powered from the track (ie, start when the track becomes live, and stop when the power from the Chrono is cut), but the actual feed for that I can work-out myself, utilising the existing track power taps.

But I've not got the foggiest idea how to assemble it and program it to do what I want.  I know I could trawl the 'net and, most probably, find instructions to do something broadly similar to what I'm after............

But has anyone here any experience with building Arduino timers??

Thanks in advance.