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January 2013 - Circuit Crush

Month: January 2013

Working with the SainSmart 5v Relay Board

Today we are working with our SainSmart 5v Relay Board. This is a simple and inexpensive 4 port SPDT relay board (there are boards with more or less relays)  that takes a digital signal (LOW) from the Arduino, through an optoisolator, which triggers a transistor, pulling in the relay. The relay contacts are rated for 10 amps at 120/240vac, …

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