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 ...
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Used office PCs are the new Raspberry Pi (at half the price)
Raspberry Pi isn't the best cheap computer anymore ...
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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