Pololu Universal Aluminium Mounting Hub for 8mm Shafts - M3 Holes (2-Pack) _HA_INPUT you can get drivers here

you can get drivers here

or a synth-wave generator)

Note: The 5V Trinket shown in photos is not included

and can be mounted flat against a flat or curved surface

it can be removed from the Pi and used on its own

Pololu Universal Aluminium Mounting Hub for 8mm Shafts - M3 Holes (2-Pack) _HA_INPUT you can get drivers hereThese Pololu universal aluminium mounting hubs allow you to mount custom wheels and mechanisms to 8mm diameter motor shafts The set includes two hubs, four M3 set screws for securing the hubs to motor shafts, and one 1. 5mm Allen wrench for use with the set screws. Each hub has six threaded mounting holes for M3 screws (not included). We have an assortment of universal mounting hubs available, spanning several shaft sizes and featuring mounting holes