The 50 ms period _IS_ the startup time of the GP2D12 itself, and the time interval between two distance measurements. See oscilloscope trace (top of page): www.philohome.com/se.../scope.htm Philo (...) (23 years ago, 20-Oct-01, to lugnet.robotics)
(...) Just for your remembrance, i build something like that based on the schematics of Michael Gasperi. Please have a look here : (URL) (23 years ago, 20-Oct-01, to lugnet.robotics)