The RasPiO® GPIO Zero Ruler… * is the ideal quick reference for GPIO Zero hacking on the Raspberry Pi in Python * acts as a Raspberry Pi port identification aid * can be used as a ruler (cm/inches) * fits easily in toolbox, desk tidy or workbench * is very attractive * won’t be easily lost unless ‘borrowed’ https://elecena.pl/product/22715065/discontinued-raspio-gpio-zero-ruler 2023-03-06 https://elecena.pl/product/22715065/discontinued-raspio-gpio-zero-ruler 2024-09-19