CountClock Hours Only Prototype is a very basic clock that is perfectly suited for learning the first step of telling time: the hour. It displays, in a cumulative way, the hour. From 1:00:00 until 1:59:59 a single LED is highlighted, from 2:00:00 until 2:59:59 two LEDs are on. And so on and so forth...By: openproducts
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from Instructables: exploring http://ift.tt/2DWplXB
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