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This article is about a demonstration project to show how it is easy to use Arduino Platform to control high voltage devices via webpage. The author says it can be useful for many practical applications from home automation to office pranks.
He will demonstrate his concept with a single relay controlled outlet this can easily be scaled up to control up to 15 separate relays with minimal cost using the components used in the base project.
You can see more detail about this project and source code from inventgeek.com.
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