This instructable is not freshly made, I follow the link from http://ift.tt/1dlcOEk , every credit should be given the originator. I finished the project found it's hardly to tell time in the darkness even the LED are lit, especially there are one or two lit, even there...
By: martinhui
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from Instructables: exploring - technology - robots http://ift.tt/1DVjoFS
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