This is a grinder made for a certain type of....... flower. It grinds perfectly every time and is especially good if you don't want to hold a metal one outside in the winter. The size of flakes it produces is most optimal for a "water cooling device," and papers.

You'll need 1x arduino nano: https://www.ebay.com/itm/5Pcs-USB-CH340G-Nano-V3-0-16M-5V-ATmega328P-Micro-Controller-Board-For-Arduino/222545056262?ssPageName=STRK%3AMEBIDX%3AIT& _trksid=p2057872.m2749.l2649

2x m3 x 18 bolts w/ nuts hot glue (or any adhesive) 1 sg90 or 9g servo : https://www.ebay.com/itm/10Pc-Car-Boat-9G-SG90-Micro-Servo-For-RC-Robot-Helicopter-Aircraf-Airplane-Motor/132922346377?epid=23028216563&hash=item1ef2ca0b89:g:-78AAOSwcapcQYRA:rk:1:pf:1&frcectupt=true

1 m2 screw?(idk it came with servo and its horns).