http://www.ebay.com/itm/4-Channel-12V-Relay-Module-Shield-Expansion-Board-for-Arduino-Optical-Isolation-/170933232123?pt=LH_DefaultDomain_0&hash=item27cc6a21fb
Context
New type of object
Idea : controle 220ac power with arduino and relay.Step one The lz 127 project
element list:areduino duemilnueve
wire
relay
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light
