One reason I wanted to have a Raspberry Pi was to be able to cheaply run periodic scripts and monitoring apps. I could have easily left on a full PC and hid it in my closet, or I could have rented out another Amazon EC2 server, but in both cases, it’s quite expensive. With the dedicated PC, there is a significant up front cost, and depending on the power efficiency of the computer, it could cost me monthly as well in the form of an electricity bill. Amazon EC2, on the other hand, costs anywhere from $20 up to hundreds of dollars a month, which is fine if you need the full power of a server to run a website, but not ok for hacking together some stuff.
With the Raspberry Pi, I have a low cost ($35) and low power device that I can always leave on, without worrying about heat building up in a case or a large power bill— after all, the entire thing runs on a Micro USB port.
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