NanoGris is a Arduino Nano based Mutable Instruments Grids. This module can be used to trigger drums. The user interface has been modified to fit the custom panels and provide outputs for random and clock triggers on the front side. In the original schematic these are on the backside with jumpers.
The code can be uploaded on the Arduino Nano with xloader. The Hex file is downloadable from this site here.
NanoGris outputs triggers that can be used for drum patterns. It provides all functions the original Grids has like a euclidean mode.