A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate the switch and provide electrical isolation between two circuits. In this project there is no real need to isolate one circuit from the other, but we will use an Arduino UNO to control the relay. (re...
By: mi.vasilakis
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from Instructables: exploring - technology - robots http://ift.tt/1LvtlIJ
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