Thanks for all the responses.

I originally entertained something like this 2-1/2 years ago, but the
timer I needed, which was basically a racing watch, but with a large
bright red display, was not commercially available and proved too
complicated to build.

So I have to settle on just a simple timer for now, and worry about
getting something more complex later.

It is way too complicated to go into the details as far as why I need
this, but basically this will involve conducting experiments/tests on
the accuracy of human timing, and also the confirmation of certain
conclusions drawn from studying the code contained within the hardware
I'll be testing against.

1/60th of a second is important because it is specific to that hardware
and how it functions. It uses registers that change every 1/60th of a
second to make certain occurances "random". If one could react with an
accuracy of 1/60th of a second, then these occurances would follow a
predictable pattern. But of course that kind of timing is not humanly
possible with any kind of consistency.

Anyway, to simplify what I'm doing, this involves a huge number of
timed inputs(by a person) over the course of several hours. The timer
will be the reference.

If it is easier for me to get a set-up that involves frequent
resets/corrections to get the needed accuracy at any 60th of a second
over the course of several hours, then that is what I'll have to do.

P.S: The hardware itself is a videogame.

Darren Harris
Staten Island, New York.