Matrix Labs recently released the Matrix Creator, a powerful Raspberry Pi accessory that adds a whole bunch of sensors to the miniature computer (including a microphone array, temperature, UV ...

To make both the LED matrix circuit board and the control board, [Joekutz] carved out isolation paths in copper clad boards using his homemade CNC mill.

That meant making the equivalent of a body-sized matrix circuit of around 7000 sensors, as well as a circuit board with a multitude of shift registers.

This year, though, Matrix is releasing the PowerWatch X, an updated version of its predecessor that adds support for smartphone notifications over Bluetooth, turning it into a true smartwatch.