Before the Raspberry Pi came out, one cheap and easy way to get GPIO on a computer with a real operating system was to manipulate the pins on an old parallel port, then most commonly used for printers ...
Pick the best Raspberry Pi desktop OS for 2026, including Pi 5 and Pi 4 support, plus a 170MB Diet Pi base install.
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4 things the Raspberry Pi does better than any other single-board computer
Single-Board Computers are a godsend for tinkerers who want a tiny yet capable companion for their DIY projects, and there are tons of SBC models that bring their own unique features to the table.
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