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Home Automation - How to Add Relays to Arduino
How to select Relays – Its all about Power.When you are selecting a relay to connect to your Arduino you need to consider a) the power (voltage and current) of what you want to switch on and off andb) the power (voltage and current) required to drive the relay (i.e. to energise the relay coil)We will look at a number of configurations for connecting relay modules to Arduino boards:-1) Direct driven reed relays 2) Single 5V power relays powered from the Arduino board's 5V supply3) Four (...