A particularly nice detail is the hatch to access the Pi’s micro SD card, making it easy to update the software or completely switch operating systems without having to take the calculator apart.

Rather than just cramming the Pi and a cheap LCD into his Numworks graphing calculator, [Zardam] integrated it into the device so well that you’d swear it was a feature from the factory.

Working without a calculator, the circumference is the diameter ... The radius of the circle is 74 cm to the nearest cm. Practise pi and working out the circumference of circles with this quiz.

All sorts of stream decks are available on the market today, but where's the fun buying something you could create from scratch? At least, that seems to be the spirit of the Raspberry Pi maker ...