Arduino projects often involve small robots that roll forward and steer clear of walls using basic sensors. Maker UncleStem decided to push that familiar idea into uncharted territory by enlarging every part of a classic turtle-style design by a factor of seven. He had just wrapped up work on a matching seven-times-larger Arduino Uno board and wanted a project that could put the oversized microcontroller through its paces. A tortoise bot offered the perfect match because the original small version already relies on straightforward code and simple hardware.