Knowing the Hardware

The Arduinos, sensors, and motors (technically referred to as actuators) used in the projects can be purchased from a number of online retailers, with my current two favorites being Adafruit Industries and Sparkfun.[14] For the budget-conscious builder, Craigslist and eBay offer money-saving deals. Purchasing used parts from these online classified listing services may come in especially handy when searching for old Android handsets and X10 controls. But buyer beware: there is often little recourse you can take should a used part stop working a few days after you have received it. Companies like Adafruit and Sparkfun stake their reputations on their over-the-top customer support and will usually accommodate any reasonable ...

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