CONSTANT_EXPOSURE_ENLARGER_TIMER_CIRCUIT

Published:2009/7/24 3:25:00 Author:Jessie | From:SeekIC

This circuit shows how to set up a NE555 timer to produce time steps proportional to f/stopsShown are values for switch－selected times of 2, 2. 8, 4 5. 6, etc, through 45 s for constant exposure with various enlarger lens settings.



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