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Arduino Based Auto Timer / Stop Watch Timer for stroking time Measurement

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Picture of Arduino Based Auto Timer / Stop Watch Timer for stroking time Measurement
The Need:
Last week around at work I had another usual un-usual  problem to face with.  Having to make lots of mechanisms n components to work with-in seconds or fracs at times I kind-of knew this was always coming.

And invariably so my poor mind couldn't think of anything but Arduino for a handy solution that should be compact, flexible, highly customizable, rugged and most importantly easier to work around.

Step 1: The Problem:

Picture of The Problem:
What we had is an arm moving around from an actuator which we would like to tap with some contact type micro switces (limit switches) to give a feed-back signal as the awkward figure suggests.
 
2n22221 year ago

Looks like a great Project, I am new at this, I get an Error the line: char buf[15f00]; // string buffer for itoa function.

Is [15f00] right ???