Class#4 RelayBoard

This board will control light. In Subtraction class, I will make timer light(shaped sand clock). The light’s function is simple.

Flip it -> Turn on -> After 15min(or a certain time) -> Turn off -> Flip it ->..

Here is Idea Sketch link

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1. sch
Screen Shot 2015-02-26 at 10.42.13 AM

2. brd
Screen Shot 2015-02-26 at 10.44.55 AM

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