When you wake up in the early hours of the morning and wan to know how much more sleep you can get in - however have trouble focusing on the clock, this may be the project for you. Niravel Patel has created an interesting method of display how many hours are left in a user-set period by shining a laser pointer between vertical and horizontal. The device has a potentiometer which is set to a certain number of hours, and during that period of time the laser is rotated by a servo at a constant rate until the beam is horizontal - at which time your sleep is (theoretically) over. For example:
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