We
have picked up a $10 SainSmart 8 Channel DC 5V Relay Module, hooked it
up to an Arduino micro controller (a Raspberry Pi should work, too!) and
the next thing you know he's remotely controlling 8 electrical
devices... it's like building an 8 channel remote, each relay on the
board can handle some serious juice, up to 10A 230V AC, 30V 10A DC. It's
super easy to set up. Learn how in the video!
Courtesy: DIY Tryin
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