My kids always brush too fast.So I make them a clock with a button on the top which when pushed will start counting from 1s to 120s.They are now using that as their 2 minute timer.It is a pretty simple project,if you have an RTC clock and an Arduino compatible board you can get it done. Material ...By: AdiM3
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from Instructables: exploring - technology - robots http://ift.tt/1Do3f4T
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