Arduino Clock - Seven Segment + RTC DS1307 By neutron_robot in CircuitsArduino30,547226Save PDFFavoriteIntroduction: Arduino Clock - Seven Segment + RTC DS1307By neutron_robotDuwi ArsanaFollowMore by the author: I make a digital clock with RTC and arduino with seven segment. i found the schematic from Syst3mX "Make A Digital Clock From Scratch ".