![]() The Raspberry Pi 40-pin GPIO has been unofficially adopted by many SBC (Small Board Computer) manufacturers, allowing designs and code for the Raspberry Pi to be ported onto other platforms. Pretty well any digital I/O sensor or device that you can interface to an Arduino can be attached to a Raspberry Pi using the GPIO, allowing your designs to benefit from the increased speed, storage, and power the Pi provides. The GPIO is also ideal for experimenters and makers who want to interface their Raspberry Pi with the outside world. The bus provides access to power (5v and 3.3v), communications and general-purpose digital I/O signals. The GPIO allows you to expand your Raspberry Pi using expansion boards called HATs, an acronym for Hardware Attached on Top. Original models used a 26-pin bus but all modern Raspberry Pi boards have a 40-pin GPIO. The Raspberry Pi GPIO (General Purpose Input/Output) bus is a connector found on every model of Raspberry Pi.
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