Inside [Klaus]’ device is an Arduino ... sensor used a small TFT to display the distance to an object, but after a few revisions, [Klaus] redesigned the device to speak the current distance ...

Unlike a Raspberry Pi, you won't find anything resembling an operating system here; instead, the Arduino uses simplified ...

[zapta] didn’t put an Arduino inside ... components on the board, and reverse engineered enough of the critical aspects (such as the motor controller and proximity sensor) to write a new open ...