Pulse Reading from Coin slot to Arduino

Gedon:
http://e-gizmo.com/wordpress/?p=895
The vendor explained briefly what output is generated when coins are inserted.

Are you certain you have one that's been "fixed"? Half that article talks about how those mechanisms were pulsing far more often, and for a longer duration, than they'd expected.

Might be you've got one of the early ones?
Geoff