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IoT: Building Arduino-Based Projects by Drew Van Duren, Brian Russell, Pradeeka Seneviratne, Peter Waher

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Selecting a PowerSwitch Tail

PowerSwitch Tail has a built-in AC relay that is activated between 3-12 VDC. This is designed to easily integrate with many microcontroller platforms, such as Arduino, Raspberry Pi, BeagleBone, and so on. Usually, Arduino digital output provides 5VDC that allows it to activate the AC (Alternative Current) relay inside the PowerSwitch Tail. Using a PowerSwitch Tail with your microcontroller projects provides safety since it distinguishes between AC and DC circuitry by using an optocoupler which is an optically activated switch.

PowerSwitch Tail ships in several variants. At the time of writing this book, the product website lists various PowerSwitch Tails, assembled and in kit form, that can be used with this project. ...

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